C# | Check if the BitArray is read-only Last Updated : 11 Jul, 2025 Comments Improve Suggest changes Like Article Like Report The BitArray class manages a compact array of bit values, which are represented as Booleans, where true indicates that the bit is on i.e, 1 and false indicates the bit is off i.e, 0. This class is contained in System.Collections namespace. BitArray.IsReadOnly property is used to get a value indicating whether the BitArray is read-only or not. Properties: The BitArray class is a collection class in which the capacity is always the same as the count. Elements are added to a BitArray by increasing the Length property. Elements are deleted by decreasing the Length property. Elements in this collection can be accessed using an integer index. Indexes in this collection are zero-based. Syntax: public bool IsReadOnly { get; } Return Value: This property is always false. Example: CSHARP // C# code to check if the // BitArray is read-only using System; using System.Collections; class GFG { // Driver code public static void Main() { // Creating a BitArray BitArray myBitArr = new BitArray(new byte[] { 0, 0, 0, 1 }); // Checking if the BitArray is read-only Console.WriteLine(myBitArr.IsReadOnly); } } Output: False Note: A collection that is read-only does not allow the addition, removal, or modification of elements after the collection is created. This method is an O(1) operation. A collection that is read-only is simply a collection with a wrapper that prevents modifying the collection. Therefore, if changes are made to the underlying collection, the read-only collection reflects those changes. Reference: https://learn.microsoft.com/en-us/dotnet/api/system.collections.bitarray.isreadonly?view=netframework-4.7.2 Create Quiz Comment S Sahil_Bansall Follow 0 Improve S Sahil_Bansall Follow 0 Improve Article Tags : C# CSharp-Collections-Namespace CSharp-Collections-BitArray Explore IntroductionC# Tutorial 2 min read Introduction to .NET Framework 6 min read C# .NET Framework (Basic Architecture and Component Stack) 6 min read C# Hello World 2 min read Common Language Runtime (CLR) in C# 4 min read FundamentalsC# Identifiers 2 min read Data Types in C# 6 min read C# Variables 4 min read C# Literals 5 min read Operators in C# 7 min read C# Keywords 5 min read Control StatementsC# Decision Making (if, if-else, if-else-if ladder, nested if, switch, nested switch) 5 min read C# Switch Statement 4 min read Loops in C# 4 min read C# Jump Statements (Break, Continue, Goto, Return and Throw) 4 min read OOP ConceptsClass and Objects in C# 4 min read Constructors in C# 5 min read C# Inheritance 3 min read Encapsulation in C# 2 min read C# Abstraction 4 min read MethodsMethods in C# 4 min read Method Overloading in C# 4 min read Method Parameters in C# 4 min read Method Overriding in C# 7 min read Anonymous Method in C# 2 min read ArraysArrays in C# 6 min read Jagged Arrays in C# 4 min read Array Class in C# 5 min read How to Sort an Array in C# | Array.Sort() Method Set - 1 8 min read How to find the rank of an array in C# 2 min read ArrayListArrayList in C# 6 min read ArrayList Class in C# 4 min read C# | Array vs ArrayList 2 min read StringStrings in C# 6 min read C# Verbatim String Literal - @ 5 min read C# String Class 9 min read C# StringBuilder 2 min read C# String vs StringBuilder 3 min read TupleC# Tuple 7 min read C# Tuple Class 3 min read C# ValueTuple 7 min read C# ValueTuple Struct 4 min read IndexersC# Indexers 5 min read C# Multidimensional Indexers 5 min read C# - Overloading of Indexers 3 min read Like