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<Type Name="WebRequest" FullName="System.Net.WebRequest">
<TypeSignature Language="C#" Value="public abstract class WebRequest : MarshalByRefObject, System.Runtime.Serialization.ISerializable" FrameworkAlternate="net-10.0;net-11.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1" />
<TypeSignature Language="ILAsm" Value=".class public auto ansi abstract beforefieldinit WebRequest extends System.MarshalByRefObject implements class System.Runtime.Serialization.ISerializable" FrameworkAlternate="net-10.0;net-11.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1" />
<TypeSignature Language="DocId" Value="T:System.Net.WebRequest" />
<TypeSignature Language="VB.NET" Value="Public MustInherit Class WebRequest
Inherits MarshalByRefObject
Implements ISerializable" FrameworkAlternate="net-10.0;net-11.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1" />
<TypeSignature Language="F#" Value="type WebRequest = class
 inherit MarshalByRefObject
 interface ISerializable" FrameworkAlternate="net-10.0;net-11.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1" />
<TypeSignature Language="C++ CLI" Value="public ref class WebRequest abstract : MarshalByRefObject, System::Runtime::Serialization::ISerializable" FrameworkAlternate="net-10.0;net-11.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1" />
<TypeSignature Language="C#" Value="public abstract class WebRequest" FrameworkAlternate="netcore-1.0;netcore-1.1" />
<TypeSignature Language="ILAsm" Value=".class public auto ansi abstract beforefieldinit WebRequest extends System.Object" FrameworkAlternate="netcore-1.0;netcore-1.1" />
<TypeSignature Language="VB.NET" Value="Public MustInherit Class WebRequest" FrameworkAlternate="netcore-1.0;netcore-1.1" />
<TypeSignature Language="F#" Value="type WebRequest = class" FrameworkAlternate="netcore-1.0;netcore-1.1" />
<TypeSignature Language="C++ CLI" Value="public ref class WebRequest abstract" FrameworkAlternate="netcore-1.0;netcore-1.1" />
<AssemblyInfo>
<AssemblyName>System.Net.Requests</AssemblyName>
<AssemblyVersion>4.0.10.0</AssemblyVersion>
<AssemblyVersion>4.1.0.0</AssemblyVersion>
<AssemblyVersion>4.1.1.0</AssemblyVersion>
<AssemblyVersion>4.1.2.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
<AssemblyVersion>11.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>System</AssemblyName>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.0.5.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>netstandard</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.1.0.0</AssemblyVersion>
</AssemblyInfo>
<TypeForwardingChain>
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Net.Requests" ToVersion="10.0.0.0" FrameworkAlternate="net-10.0" />
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Net.Requests" ToVersion="11.0.0.0" FrameworkAlternate="net-11.0" />
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Net.Requests" ToVersion="5.0.0.0" FrameworkAlternate="net-5.0" />
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Net.Requests" ToVersion="6.0.0.0" FrameworkAlternate="net-6.0" />
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Net.Requests" ToVersion="7.0.0.0" FrameworkAlternate="net-7.0" />
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Net.Requests" ToVersion="8.0.0.0" FrameworkAlternate="net-8.0" />
<TypeForwarding From="netstandard" FromVersion="2.1.0.0" To="System.Net.Requests" ToVersion="9.0.0.0" FrameworkAlternate="net-9.0" />
</TypeForwardingChain>
<Base>
<BaseTypeName>System.MarshalByRefObject</BaseTypeName>
<BaseTypeName FrameworkAlternate="netcore-1.0;netcore-1.1">System.Object</BaseTypeName>
</Base>
<Interfaces>
<Interface FrameworkAlternate="net-10.0;net-11.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1">
<InterfaceName>System.Runtime.Serialization.ISerializable</InterfaceName>
</Interface>
</Interfaces>
<Attributes>
<Attribute FrameworkAlternate="net-10.0;net-11.0;net-8.0;net-9.0">
<AttributeName Language="C#">[System.Runtime.CompilerServices.Nullable(0)]</AttributeName>
<AttributeName Language="F#">[<System.Runtime.CompilerServices.Nullable(0)>]</AttributeName>
</Attribute>
</Attributes>
<Docs>
<summary>Makes a request to a Uniform Resource Identifier (URI). This is an <see langword="abstract" /> class.</summary>
<remarks>
<format type="text/markdown"><]
]]></format>
</remarks>
<block subset="none" type="overrides">
<para>When you inherit from <see cref="T:System.Net.WebRequest" />, you must override the following members: <see cref="P:System.Net.WebRequest.Method" />, <see cref="P:System.Net.WebRequest.RequestUri" />, <see cref="P:System.Net.WebRequest.Headers" />, <see cref="P:System.Net.WebRequest.ContentLength" />, <see cref="P:System.Net.WebRequest.ContentType" />, <see cref="P:System.Net.WebRequest.Credentials" />, <see cref="P:System.Net.WebRequest.PreAuthenticate" />, <see cref="M:System.Net.WebRequest.GetRequestStream" />, <see cref="M:System.Net.WebRequest.BeginGetRequestStream(System.AsyncCallback,System.Object)" />, <see cref="M:System.Net.WebRequest.EndGetRequestStream(System.IAsyncResult)" />, <see cref="M:System.Net.WebRequest.GetResponse" />, <see cref="M:System.Net.WebRequest.BeginGetResponse(System.AsyncCallback,System.Object)" />, and <see cref="M:System.Net.WebRequest.EndGetResponse(System.IAsyncResult)" />. In addition, you must provide an implementation of the <see cref="T:System.Net.IWebRequestCreate" /> interface, which defines the <see cref="M:System.Net.IWebRequestCreate.Create(System.Uri)" /> method used when you call <see cref="M:System.Net.WebRequest.Create(System.Uri)" />. You must register the class that implements the <see cref="T:System.Net.IWebRequestCreate" /> interface, using the <see cref="M:System.Net.WebRequest.RegisterPrefix(System.String,System.Net.IWebRequestCreate)" /> method or the configuration file.</para>
</block>
<altmember cref="T:System.Net.HttpWebRequest" />
<related type="Article" href="/dotnet/framework/network-programming/requesting-data">Requesting Data</related>
<related type="Article" href="/dotnet/framework/network-programming/programming-pluggable-protocols">Programming Pluggable Protocols</related>
</Docs>
<Members>
<MemberGroup MemberName=".ctor">
<AssemblyInfo>
<AssemblyName>System.Net.Requests</AssemblyName>
<AssemblyVersion>4.0.10.0</AssemblyVersion>
<AssemblyVersion>4.1.0.0</AssemblyVersion>
</AssemblyInfo>
<Docs>
<summary>Initializes a new instance of the <see cref="T:System.Net.WebRequest" /> class.</summary>
</Docs>
</MemberGroup>
<Member MemberName=".ctor">
<MemberSignature Language="C#" Value="protected WebRequest ();" />
<MemberSignature Language="ILAsm" Value=".method familyhidebysig specialname rtspecialname instance void .ctor() cil managed" />
<MemberSignature Language="DocId" Value="M:System.Net.WebRequest.#ctor" />
<MemberSignature Language="VB.NET" Value="Protected Sub New ()" />
<MemberSignature Language="C++ CLI" Value="protected:
 WebRequest();" />
<MemberType>Constructor</MemberType>
<AssemblyInfo>
<AssemblyName>System.Net.Requests</AssemblyName>
<AssemblyVersion>4.0.10.0</AssemblyVersion>
<AssemblyVersion>4.1.0.0</AssemblyVersion>
<AssemblyVersion>4.1.1.0</AssemblyVersion>
<AssemblyVersion>4.1.2.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
<AssemblyVersion>11.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>System</AssemblyName>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.0.5.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>netstandard</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.1.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute FrameworkAlternate="net-10.0;net-11.0;net-6.0;net-7.0;net-8.0;net-9.0">
<AttributeName Language="C#">[System.Obsolete("WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete. Use HttpClient instead.", DiagnosticId="SYSLIB0014", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]</AttributeName>
<AttributeName Language="F#">[<System.Obsolete("WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete. Use HttpClient instead.", DiagnosticId="SYSLIB0014", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]</AttributeName>
</Attribute>
</Attributes>
<Parameters />
<Docs>
<summary>Initializes a new instance of the <see cref="T:System.Net.WebRequest" /> class.</summary>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
Use the <xref:System.Net.WebRequest.Create*> method to initialize new <xref:System.Net.WebRequest> instances. Do not use the constructor.
## Examples
The following example shows how to create a <xref:System.Net.WebRequest> instance by calling the <xref:System.Net.WebRequest.Create*> method on the <xref:System.Net.WebRequest> class.
:::code language="csharp" source="~/snippets/csharp/System.Net/WebRequest/.ctor/source.cs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/System.Net/WebRequest/.ctor/source.vb" id="Snippet1":::
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName=".ctor">
<MemberSignature Language="C#" Value="protected WebRequest (System.Runtime.Serialization.SerializationInfo serializationInfo, System.Runtime.Serialization.StreamingContext streamingContext);" />
<MemberSignature Language="ILAsm" Value=".method familyhidebysig specialname rtspecialname instance void .ctor(class System.Runtime.Serialization.SerializationInfo serializationInfo, valuetype System.Runtime.Serialization.StreamingContext streamingContext) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Net.WebRequest.#ctor(System.Runtime.Serialization.SerializationInfo,System.Runtime.Serialization.StreamingContext)" />
<MemberSignature Language="VB.NET" Value="Protected Sub New (serializationInfo As SerializationInfo, streamingContext As StreamingContext)" />
<MemberSignature Language="F#" Value="new System.Net.WebRequest : System.Runtime.Serialization.SerializationInfo * System.Runtime.Serialization.StreamingContext -> System.Net.WebRequest" Usage="new System.Net.WebRequest (serializationInfo, streamingContext)" />
<MemberSignature Language="C++ CLI" Value="protected:
 WebRequest(System::Runtime::Serialization::SerializationInfo ^ serializationInfo, System::Runtime::Serialization::StreamingContext streamingContext);" />
<MemberType>Constructor</MemberType>
<AssemblyInfo>
<AssemblyName>System</AssemblyName>
<AssemblyVersion>1.0.5000.0</AssemblyVersion>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.0.5.0</AssemblyVersion>
<AssemblyVersion>4.0.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>netstandard</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.1.0.0</AssemblyVersion>
</AssemblyInfo>
<AssemblyInfo>
<AssemblyName>System.Net.Requests</AssemblyName>
<AssemblyVersion>4.1.0.0</AssemblyVersion>
<AssemblyVersion>4.1.1.0</AssemblyVersion>
<AssemblyVersion>4.1.2.0</AssemblyVersion>
<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
<AssemblyVersion>11.0.0.0</AssemblyVersion>
</AssemblyInfo>
<Attributes>
<Attribute FrameworkAlternate="net-10.0;net-11.0;net-8.0;net-9.0">
<AttributeName Language="C#">[System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]</AttributeName>
<AttributeName Language="F#">[<System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)>]</AttributeName>
</Attribute>
<Attribute FrameworkAlternate="net-10.0;net-11.0;net-6.0;net-7.0;net-8.0;net-9.0">
<AttributeName Language="C#">[System.Obsolete("WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete. Use HttpClient instead.", DiagnosticId="SYSLIB0014", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]</AttributeName>
<AttributeName Language="F#">[<System.Obsolete("WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete. Use HttpClient instead.", DiagnosticId="SYSLIB0014", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]</AttributeName>
</Attribute>
</Attributes>
<Parameters>
<Parameter Name="serializationInfo" Type="System.Runtime.Serialization.SerializationInfo" Index="0" FrameworkAlternate="net-10.0;net-11.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1" />
<Parameter Name="streamingContext" Type="System.Runtime.Serialization.StreamingContext" Index="1" FrameworkAlternate="net-10.0;net-11.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1" />
</Parameters>
<Docs>
<param name="serializationInfo">The information required to serialize the new <see cref="T:System.Net.WebRequest" /> instance.</param>
<param name="streamingContext">A <see cref="T:System.Runtime.Serialization.StreamingContext" /> that indicates the source of the serialized stream associated with the new <see cref="T:System.Net.WebRequest" /> instance.</param>
<summary>Initializes a new instance of the <see cref="T:System.Net.WebRequest" /> class from the specified instances of the <see cref="T:System.Runtime.Serialization.SerializationInfo" /> and <see cref="T:System.Runtime.Serialization.StreamingContext" /> classes.</summary>
<remarks>To be added.</remarks>
<exception cref="T:System.NotImplementedException">Any attempt is made to access the constructor, when the constructor is not overridden in a descendant class.</exception>
</Docs>
</Member>
<Member MemberName="Abort">
<MemberSignature Language="C#" Value="public virtual void Abort ();" FrameworkAlternate="net-10.0;net-11.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance void Abort() cil managed" />
<MemberSignature Language="DocId" Value="M:System.Net.WebRequest.Abort" />
<MemberSignature Language="VB.NET" Value="Public Overridable Sub Abort ()" FrameworkAlternate="net-10.0;net-11.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1" />
<MemberSignature Language="F#" Value="abstract member Abort : unit -> unit
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<MemberSignature Language="F#" Value="abstract member Abort : unit -> unit" Usage="webRequest.Abort " FrameworkAlternate="netcore-1.0;netcore-1.1" />
<MemberSignature Language="C++ CLI" Value="public:
 abstract void Abort();" FrameworkAlternate="netcore-1.0;netcore-1.1" />
<MemberType>Method</MemberType>
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<AssemblyInfo>
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<AssemblyVersion>2.1.0.0</AssemblyVersion>
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<ReturnValue>
<ReturnType>System.Void</ReturnType>
</ReturnValue>
<Parameters />
<Docs>
<summary>Aborts the request.</summary>
<remarks>
<format type="text/markdown"><]
]]></format>
</remarks>
<exception cref="T:System.NotImplementedException">Any attempt is made to access the method, when the method is not overridden in a descendant class.</exception>
</Docs>
</Member>
<Member MemberName="AuthenticationLevel">
<MemberSignature Language="C#" Value="public System.Net.Security.AuthenticationLevel AuthenticationLevel { get; set; }" />
<MemberSignature Language="ILAsm" Value=".property instance valuetype System.Net.Security.AuthenticationLevel AuthenticationLevel" />
<MemberSignature Language="DocId" Value="P:System.Net.WebRequest.AuthenticationLevel" />
<MemberSignature Language="VB.NET" Value="Public Property AuthenticationLevel As AuthenticationLevel" />
<MemberSignature Language="F#" Value="member this.AuthenticationLevel : System.Net.Security.AuthenticationLevel with get, set" Usage="System.Net.WebRequest.AuthenticationLevel" />
<MemberSignature Language="C++ CLI" Value="public:
 property System::Net::Security::AuthenticationLevel AuthenticationLevel { System::Net::Security::AuthenticationLevel get(); void set(System::Net::Security::AuthenticationLevel value); };" />
<MemberType>Property</MemberType>
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<AssemblyName>System</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
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<AssemblyVersion>4.0.0.0</AssemblyVersion>
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<AssemblyName>netstandard</AssemblyName>
<AssemblyVersion>2.0.0.0</AssemblyVersion>
<AssemblyVersion>2.1.0.0</AssemblyVersion>
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<AssemblyInfo>
<AssemblyName>System.Net.Requests</AssemblyName>
<AssemblyVersion>4.1.0.0</AssemblyVersion>
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<AssemblyVersion>5.0.0.0</AssemblyVersion>
<AssemblyVersion>6.0.0.0</AssemblyVersion>
<AssemblyVersion>7.0.0.0</AssemblyVersion>
<AssemblyVersion>8.0.0.0</AssemblyVersion>
<AssemblyVersion>9.0.0.0</AssemblyVersion>
<AssemblyVersion>10.0.0.0</AssemblyVersion>
<AssemblyVersion>11.0.0.0</AssemblyVersion>
</AssemblyInfo>
<ReturnValue>
<ReturnType>System.Net.Security.AuthenticationLevel</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets or sets values indicating the level of authentication and impersonation used for this request.</summary>
<value>A bitwise combination of the <see cref="T:System.Net.Security.AuthenticationLevel" /> values. The default value is <see cref="F:System.Net.Security.AuthenticationLevel.MutualAuthRequested" />.
In mutual authentication, both the client and server present credentials to establish their identity. The <see cref="F:System.Net.Security.AuthenticationLevel.MutualAuthRequired" /> and <see cref="F:System.Net.Security.AuthenticationLevel.MutualAuthRequested" /> values are relevant for Kerberos authentication. Kerberos authentication can be supported directly, or can be used if the Negotiate security protocol is used to select the actual security protocol. For more information about authentication protocols, see <see href="/dotnet/framework/network-programming/internet-authentication">Internet Authentication</see>.
To determine whether mutual authentication occurred, check the <see cref="P:System.Net.WebResponse.IsMutuallyAuthenticated" /> property.
If you specify the <see cref="F:System.Net.Security.AuthenticationLevel.MutualAuthRequired" /> authentication flag value and mutual authentication does not occur, your application will receive an <see cref="T:System.IO.IOException" /> with a <see cref="T:System.Net.ProtocolViolationException" /> inner exception indicating that mutual authentication failed.</value>
<remarks>
<format type="text/markdown"><![CDATA[
## Examples
The following code example sets the value of this property.
:::code language="csharp" source="~/snippets/csharp/Microsoft.Win32/IntranetZoneCredentialPolicy/Overview/websample.cs" id="Snippet1":::
]]></format>
</remarks>
</Docs>
</Member>
<Member MemberName="BeginGetRequestStream">
<MemberSignature Language="C#" Value="public virtual IAsyncResult BeginGetRequestStream (AsyncCallback? callback, object? state);" FrameworkAlternate="net-10.0;net-11.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance class System.IAsyncResult BeginGetRequestStream(class System.AsyncCallback callback, object state) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Net.WebRequest.BeginGetRequestStream(System.AsyncCallback,System.Object)" />
<MemberSignature Language="VB.NET" Value="Public Overridable Function BeginGetRequestStream (callback As AsyncCallback, state As Object) As IAsyncResult" FrameworkAlternate="net-10.0;net-11.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1" />
<MemberSignature Language="F#" Value="abstract member BeginGetRequestStream : AsyncCallback * obj -> IAsyncResult
override this.BeginGetRequestStream : AsyncCallback * obj -> IAsyncResult" Usage="webRequest.BeginGetRequestStream (callback, state)" FrameworkAlternate="net-10.0;net-11.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1" />
<MemberSignature Language="C++ CLI" Value="public:
 virtual IAsyncResult ^ BeginGetRequestStream(AsyncCallback ^ callback, System::Object ^ state);" FrameworkAlternate="net-10.0;net-11.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1" />
<MemberSignature Language="C#" Value="public abstract IAsyncResult BeginGetRequestStream (AsyncCallback callback, object state);" FrameworkAlternate="netcore-1.0;netcore-1.1" />
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<MemberSignature Language="F#" Value="abstract member BeginGetRequestStream : AsyncCallback * obj -> IAsyncResult" Usage="webRequest.BeginGetRequestStream (callback, state)" FrameworkAlternate="netcore-1.0;netcore-1.1" />
<MemberSignature Language="C++ CLI" Value="public:
 abstract IAsyncResult ^ BeginGetRequestStream(AsyncCallback ^ callback, System::Object ^ state);" FrameworkAlternate="netcore-1.0;netcore-1.1" />
<MemberSignature Language="C#" Value="public virtual IAsyncResult BeginGetRequestStream (AsyncCallback callback, object state);" FrameworkAlternate="netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1" />
<MemberType>Method</MemberType>
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<ReturnValue>
<ReturnType>System.IAsyncResult</ReturnType>
<Attributes>
<Attribute FrameworkAlternate="net-10.0">
<AttributeName Language="C#">[System.Runtime.CompilerServices.Nullable(1)]</AttributeName>
<AttributeName Language="F#">[<System.Runtime.CompilerServices.Nullable(1)>]</AttributeName>
</Attribute>
</Attributes>
</ReturnValue>
<Parameters>
<Parameter Name="callback" Type="System.AsyncCallback" />
<Parameter Name="state" Type="System.Object" />
</Parameters>
<Docs>
<param name="callback">The <see cref="T:System.AsyncCallback" /> delegate.</param>
<param name="state">An object containing state information for this asynchronous request.</param>
<summary>When overridden in a descendant class, provides an asynchronous version of the <see cref="M:System.Net.WebRequest.GetRequestStream" /> method.</summary>
<returns>An <see cref="T:System.IAsyncResult" /> that references the asynchronous request.</returns>
<remarks>
<format type="text/markdown"><]
]]></format>
</remarks>
<exception cref="T:System.NotImplementedException">Any attempt is made to access the method, when the method is not overridden in a descendant class.</exception>
<altmember cref="M:System.Net.WebRequest.EndGetRequestStream(System.IAsyncResult)" />
<related type="Article" href="/dotnet/framework/network-programming/making-asynchronous-requests">Making Asynchronous Requests</related>
</Docs>
</Member>
<Member MemberName="BeginGetResponse">
<MemberSignature Language="C#" Value="public virtual IAsyncResult BeginGetResponse (AsyncCallback? callback, object? state);" FrameworkAlternate="net-10.0;net-11.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0" />
<MemberSignature Language="ILAsm" Value=".method public hidebysig newslot virtual instance class System.IAsyncResult BeginGetResponse(class System.AsyncCallback callback, object state) cil managed" />
<MemberSignature Language="DocId" Value="M:System.Net.WebRequest.BeginGetResponse(System.AsyncCallback,System.Object)" />
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<MemberSignature Language="F#" Value="abstract member BeginGetResponse : AsyncCallback * obj -> IAsyncResult
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 virtual IAsyncResult ^ BeginGetResponse(AsyncCallback ^ callback, System::Object ^ state);" FrameworkAlternate="net-10.0;net-11.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1" />
<MemberSignature Language="C#" Value="public abstract IAsyncResult BeginGetResponse (AsyncCallback callback, object state);" FrameworkAlternate="netcore-1.0;netcore-1.1" />
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<ReturnValue>
<ReturnType>System.IAsyncResult</ReturnType>
<Attributes>
<Attribute FrameworkAlternate="net-10.0">
<AttributeName Language="C#">[System.Runtime.CompilerServices.Nullable(1)]</AttributeName>
<AttributeName Language="F#">[<System.Runtime.CompilerServices.Nullable(1)>]</AttributeName>
</Attribute>
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</ReturnValue>
<Parameters>
<Parameter Name="callback" Type="System.AsyncCallback" />
<Parameter Name="state" Type="System.Object" />
</Parameters>
<Docs>
<param name="callback">The <see cref="T:System.AsyncCallback" /> delegate.</param>
<param name="state">An object containing state information for this asynchronous request.</param>
<summary>When overridden in a descendant class, begins an asynchronous request for an Internet resource.</summary>
<returns>An <see cref="T:System.IAsyncResult" /> that references the asynchronous request.</returns>
<remarks>
<format type="text/markdown"><]
]]></format>
</remarks>
<exception cref="T:System.NotImplementedException">Any attempt is made to access the method, when the method is not overridden in a descendant class.</exception>
<altmember cref="M:System.Net.WebRequest.EndGetResponse(System.IAsyncResult)" />
<altmember cref="M:System.Net.WebRequest.GetResponse" />
<related type="Article" href="/dotnet/framework/network-programming/making-asynchronous-requests">Making Asynchronous Requests</related>
</Docs>
</Member>
<Member MemberName="CachePolicy">
<MemberSignature Language="C#" Value="public virtual System.Net.Cache.RequestCachePolicy? CachePolicy { get; set; }" FrameworkAlternate="net-10.0;net-11.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0" />
<MemberSignature Language="ILAsm" Value=".property instance class System.Net.Cache.RequestCachePolicy CachePolicy" />
<MemberSignature Language="DocId" Value="P:System.Net.WebRequest.CachePolicy" />
<MemberSignature Language="VB.NET" Value="Public Overridable Property CachePolicy As RequestCachePolicy" />
<MemberSignature Language="F#" Value="member this.CachePolicy : System.Net.Cache.RequestCachePolicy with get, set" Usage="System.Net.WebRequest.CachePolicy" />
<MemberSignature Language="C++ CLI" Value="public:
 virtual property System::Net::Cache::RequestCachePolicy ^ CachePolicy { System::Net::Cache::RequestCachePolicy ^ get(); void set(System::Net::Cache::RequestCachePolicy ^ value); };" />
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<MemberType>Property</MemberType>
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<Attributes>
<Attribute FrameworkAlternate="net-10.0;net-11.0;net-8.0;net-9.0">
<AttributeName Language="C#">[System.Runtime.CompilerServices.Nullable(2)]</AttributeName>
<AttributeName Language="F#">[<System.Runtime.CompilerServices.Nullable(2)>]</AttributeName>
</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.Net.Cache.RequestCachePolicy</ReturnType>
</ReturnValue>
<Docs>
<summary>Gets or sets the cache policy for this request.</summary>
<value>A <see cref="T:System.Net.Cache.RequestCachePolicy" /> object that defines a cache policy.</value>
<remarks>
<format type="text/markdown"><]
]]></format>
</remarks>
<altmember cref="T:System.Net.Cache.RequestCachePolicy" />
<altmember cref="T:System.Net.Cache.HttpRequestCacheLevel" />
<altmember cref="T:System.Net.Cache.RequestCacheLevel" />
<altmember cref="P:System.Net.HttpWebRequest.DefaultCachePolicy" />
<altmember cref="P:System.Net.WebRequest.DefaultCachePolicy" />
</Docs>
</Member>
<Member MemberName="ConnectionGroupName">
<MemberSignature Language="C#" Value="public virtual string? ConnectionGroupName { get; set; }" FrameworkAlternate="net-10.0;net-11.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0" />
<MemberSignature Language="ILAsm" Value=".property instance string ConnectionGroupName" />
<MemberSignature Language="DocId" Value="P:System.Net.WebRequest.ConnectionGroupName" />
<MemberSignature Language="VB.NET" Value="Public Overridable Property ConnectionGroupName As String" />
<MemberSignature Language="F#" Value="member this.ConnectionGroupName : string with get, set" Usage="System.Net.WebRequest.ConnectionGroupName" />
<MemberSignature Language="C++ CLI" Value="public:
 virtual property System::String ^ ConnectionGroupName { System::String ^ get(); void set(System::String ^ value); };" />
<MemberSignature Language="C#" Value="public virtual string ConnectionGroupName { get; set; }" FrameworkAlternate="netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1" />
<MemberType>Property</MemberType>
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</Attribute>
</Attributes>
<ReturnValue>
<ReturnType>System.String</ReturnType>
</ReturnValue>
<Docs>
<summary>When overridden in a descendant class, gets or sets the name of the connection group for the request.</summary>
<value>The name of the connection group for the request.</value>
<remarks>
<format type="text/markdown"><]
]]></format>
</remarks>
<exception cref="T:System.NotImplementedException">Any attempt is made to get or set the property, when the property is not overridden in a descendant class.</exception>
<block subset="none" type="overrides">
<para>The <see cref="P:System.Net.WebRequest.ConnectionGroupName" /> property typically associates a group of requests that share a set of credentials with a connection to an Internet resource to avoid potential security failures.</para>
</block>
<altmember cref="P:System.Net.HttpWebRequest.ConnectionGroupName" />
<related type="Article" href="/dotnet/framework/network-programming/connection-grouping">Connection Grouping</related>
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<Member MemberName="ContentLength">
<MemberSignature Language="C#" Value="public virtual long ContentLength { get; set; }" />
<MemberSignature Language="ILAsm" Value=".property instance int64 ContentLength" />
<MemberSignature Language="DocId" Value="P:System.Net.WebRequest.ContentLength" />
<MemberSignature Language="VB.NET" Value="Public Overridable Property ContentLength As Long" />
<MemberSignature Language="F#" Value="member this.ContentLength : int64 with get, set" Usage="System.Net.WebRequest.ContentLength" />
<MemberSignature Language="C++ CLI" Value="public:
 virtual property long ContentLength { long get(); void set(long value); };" />
<MemberType>Property</MemberType>
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<summary>When overridden in a descendant class, gets or sets the content length of the request data being sent.</summary>
<value>The number of bytes of request data being sent.</value>
<remarks>
<format type="text/markdown"><]
]]></format>
</remarks>
<exception cref="T:System.NotImplementedException">Any attempt is made to get or set the property, when the property is not overridden in a descendant class.</exception>
<altmember cref="P:System.Net.HttpWebRequest.ContentLength" />
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<summary>When overridden in a descendant class, gets or sets the content type of the request data being sent.</summary>
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<summary>Initializes a new <see cref="T:System.Net.WebRequest" />.</summary>
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<param name="requestUriString">The URI that identifies the Internet resource.</param>
<summary>Initializes a new <see cref="T:System.Net.WebRequest" /> instance for the specified URI scheme.</summary>
<returns>A <see cref="T:System.Net.WebRequest" /> descendant for the specific URI scheme.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The <xref:System.Net.WebRequest.Create*> method returns a descendant of the <xref:System.Net.WebRequest> class determined at run time as the closest registered match for `requestUri`.
For example, when a URI beginning with `http://` or `https://` is passed in `requestUri`, an <xref:System.Net.HttpWebRequest> is returned by <xref:System.Net.WebRequest.Create*>. If a URI beginning with `ftp://` is passed instead, the <xref:System.Net.WebRequest.Create*> method will return a <xref:System.Net.FtpWebRequest> instance. If a URI beginning with `file://` is passed instead, the <xref:System.Net.WebRequest.Create*> method will return a <xref:System.Net.FileWebRequest> instance.
The pre-registered reserve types already registered include the following:
- `http://`
- `https://`
- `ftp://`
- `file://`
.NET includes support for the `http://`, `https://`, `ftp://`, and `file://` URI schemes. Custom <xref:System.Net.WebRequest> descendants to handle other requests are registered with the <xref:System.Net.WebRequest.RegisterPrefix*> method.
The <xref:System.Net.WebRequest.Create*> method uses the `requestUriString` parameter to create a <xref:System.Uri> instance that it passes to the new <xref:System.Net.WebRequest>.
> [!NOTE]
> This member outputs trace information when you enable network tracing in your application. For more information, see [Network Tracing in the .NET Framework](/dotnet/framework/network-programming/network-tracing).
## Examples
The following example uses <xref:System.Net.WebRequest.Create*> to instantiate an <xref:System.Net.HttpWebRequest> instance. A string representing the target URL is used as the constructor parameter.
:::code language="csharp" source="~/snippets/csharp/System.Net/WebRequest/Create/webresponse_responseuri.cs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/System.Net/WebRequest/Create/webresponse_responseuri.vb" id="Snippet1":::
]]></format>
</remarks>
<exception cref="T:System.NotSupportedException">The request scheme specified in <paramref name="requestUriString" /> has not been registered.</exception>
<exception cref="T:System.ArgumentNullException">
<paramref name="requestUriString" /> is <see langword="null" />.</exception>
<exception cref="T:System.Security.SecurityException">The caller does not have <see cref="T:System.Net.WebPermissionAttribute" /> permission to connect to the requested URI or a URI that the request is redirected to.</exception>
<exception cref="T:System.UriFormatException">The URI specified in <paramref name="requestUriString" /> is not a valid URI.</exception>
<related type="Article" href="/dotnet/framework/network-programming/programming-pluggable-protocols">Programming Pluggable Protocols</related>
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<param name="requestUri">A <see cref="T:System.Uri" /> containing the URI of the requested resource.</param>
<summary>Initializes a new <see cref="T:System.Net.WebRequest" /> instance for the specified URI scheme.</summary>
<returns>A <see cref="T:System.Net.WebRequest" /> descendant for the specified URI scheme.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The <xref:System.Net.WebRequest.Create*> method returns a descendant of the <xref:System.Net.WebRequest> class determined at run time as the closest registered match for `requestUri`.
For example, if you create a <xref:System.Net.WebRequest> descendant, Handler1, to handle requests to `http://www.contoso.com/text/` and another named Handler2 to handle requests to `http://www.contoso.com/code/`, you can use <xref:System.Net.WebRequest.Create*> method to return the WebRequest descendant associated with either specified URI.
To return a descendant of the <xref:System.Net.WebRequest> class based on only the scheme portion of a URI, use the <xref:System.Net.WebRequest.CreateDefault*> method.
For example, when a URI beginning with `http://` or `https://` is passed in `requestUri`, an <xref:System.Net.HttpWebRequest> is returned by <xref:System.Net.WebRequest.Create*>. If a URI beginning with `ftp://` is passed instead, the <xref:System.Net.WebRequest.Create*> method will return a <xref:System.Net.FileWebRequest> instance. If a URI beginning with `file://` is passed instead, the <xref:System.Net.WebRequest.Create*> method will return a <xref:System.Net.FileWebRequest> instance.
The pre-registered reserve types already registered include the following:
- `http://`
- `https://`
- `ftp://`
- `file://`
.NET includes support for the `http://`, `https://`, `ftp://`, and `file://` URI schemes. Custom <xref:System.Net.WebRequest> descendants to handle other requests are registered with the <xref:System.Net.WebRequest.RegisterPrefix*> method.
> [!NOTE]
> This member outputs trace information when you enable network tracing in your application. For more information, see [Network Tracing in the .NET Framework](/dotnet/framework/network-programming/network-tracing).
## Examples
The following example uses <xref:System.Net.WebRequest.Create*> to instantiate an <xref:System.Net.HttpWebRequest> instance. A Uri representing the target URL is used as the constructor parameter.
:::code language="csharp" source="~/snippets/csharp/System.Net/WebRequest/Create/webrequest_create.cs" id="Snippet1":::
:::code language="vb" source="~/snippets/visualbasic/System.Net/WebRequest/Create/webrequest_create.vb" id="Snippet1":::
]]></format>
</remarks>
<exception cref="T:System.NotSupportedException">The request scheme specified in <paramref name="requestUri" /> is not registered.</exception>
<exception cref="T:System.ArgumentNullException">
<paramref name="requestUri" /> is <see langword="null" />.</exception>
<exception cref="T:System.Security.SecurityException">The caller does not have <see cref="T:System.Net.WebPermissionAttribute" /> permission to connect to the requested URI or a URI that the request is redirected to.</exception>
</Docs>
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<Parameter Name="requestUri" Type="System.Uri" Index="0" FrameworkAlternate="net-10.0;net-11.0;net-5.0;net-6.0;net-7.0;net-8.0;net-9.0;netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netcore-3.1" />
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<param name="requestUri">A <see cref="T:System.Uri" /> containing the URI of the requested resource.</param>
<summary>Initializes a new <see cref="T:System.Net.WebRequest" /> instance for the specified URI scheme.</summary>
<returns>A <see cref="T:System.Net.WebRequest" /> descendant for the specified URI scheme.</returns>
<remarks>
<format type="text/markdown"><![CDATA[
## Remarks
The <xref:System.Net.WebRequest.CreateDefault*> method returns a <xref:System.Net.WebRequest> descendant instance based on only the scheme portion of a URI.
For example, when a URI beginning with `http://` is passed in `requestUri`, an <xref:System.Net.HttpWebRequest> is returned by <xref:System.Net.WebRequest.CreateDefault*>. If a URI beginning with `file://` is passed instead, the <xref:System.Net.WebRequest.CreateDefault*> method will return a <xref:System.Net.FileWebRequest>.
> [!NOTE]
> This member outputs trace information when you enable network tracing in your application. For more information, see [Network Tracing in .NET](/dotnet/framework/network-programming/network-tracing).
]]></format>
</remarks>
<exception cref="T:System.NotSupportedException">The request scheme specified in <paramref name="requestUri" /> is not registered.</exception>
<exception cref="T:System.ArgumentNullException">
<paramref name="requestUri" /> is <see langword="null" />.</exception>
<exception cref="T:System.Security.SecurityException">The caller does not have <see cref="T:System.Net.WebPermissionAttribute" /> permission to connect to the requested URI or a URI that the request is redirected to.</exception>
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<summary>Initializes a new <see cref="T:System.Net.HttpWebRequest" /> instance for the specified URI.</summary>
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