BitArray Collection in C#

The BitArray collection handles a compact matrix of bit values. These bit values are represented as boolean values where true indicates 1 and false indicates 0.

Constructors in BitArray Collection

The different constructors and their description is given as follows:

Table: Constructors in BitArray in C#

Source: MSDN

Properties in BitArray Collection

The different properties and their description is given as follows:

Table: Properties in BitArray in C#

Source: MSDN

Methods in BitArray Collection

The different methods and their description is given as follows:

Table: Methods in BitArray in C#

Source: MSDN

BitArray Operations

Some of the BitArray operations are given as follows:

Create a BitArray

A BitArray can be created using new. Then the appropriate boolean values can be inserted into a BitArray. The program that demonstrates this is given as follows:

Source Code: Program to create BitArray in C#

using System;
using System.Collections;
namespace BitArrayDemo
{
  class Example
  {
     static void Main(string[] args)
     {
       BitArray bArr = new BitArray(5);
       bArr.Set(0, true);
       bArr.Set(1, false);
       bArr.Set(2, true);
       bArr.Set(3, true);
       bArr.Set(4, false);
       for (int i = 0; i < bArr.Count; i++)
       {
           Console.Write(bArr [i]);
           Console.Write(" ");
       }
     }
  }
}

The output of the above program is as follows:

True False True True False

AND Operation in BitArray

The And() method performs the AND operation bit by bit between the elements of the current BitArray and the corresponding elements of the BitArray that is specified.  The program that demonstrates this is given as follows:

Source Code: Program to demonstrate AND operation in BitArray in C#

using System;
using System.Collections;
namespace BitArrayDemo
{
  class Example
  {
     static void Main(string[] args)
     {
       BitArray bArr1 = new BitArray(5);
       BitArray bArr2 = new BitArray(5);
       bArr1.Set(0, true);
       bArr1.Set(1, false);
       bArr1.Set(2, true);
       bArr1.Set(3, true);
       bArr1.Set(4, false);
       bArr2.Set(0, true);
       bArr2.Set(1, true);
       bArr2.Set(2, false);
       bArr2.Set(3, true);
       bArr2.Set(4, false);
       Console.WriteLine("BitArray 1");
       for (int i = 0; i < bArr1.Count; i++)
       {
           Console.Write(bArr1[i]);
           Console.Write(" ");
       }
       Console.WriteLine();
       Console.WriteLine("BitArray 2");
       for (int i = 0; i < bArr2.Count; i++)
       {
           Console.Write(bArr2[i]);
           Console.Write(" ");
       }
       bArr1.And(bArr2);
       Console.WriteLine();
       Console.WriteLine("BitArray after AND operation");
       for (int i = 0; i < bArr1.Count; i++)
       {
           Console.Write(bArr1[i]);
           Console.Write(" ");      
       }
     }
  }
}

The output of the above program is as follows:

BitArray 1
True False True True False
BitArray 2
True True False True False
BitArray after AND operation
True False False True False

OR Operation in BitArray

The Or() method performs the OR operation bit by bit between the elements of the current BitArray and the corresponding elements of the BitArray that is specified.  The program that demonstrates this is given as follows:

Source Code: Program to demonstrate OR operation in BitArray in C#

using System;
using System.Collections;
namespace BitArrayDemo
{
  class Example
  {
     static void Main(string[] args)
     {
       BitArray barr1 = new BitArray(5);
       BitArray barr2 = new BitArray(5);
       barr1.Set(0, true);
       barr1.Set(1, false);
       barr1.Set(2, true);
       barr1.Set(3, true);
       barr1.Set(4, false);
       barr2.Set(0, true);
       barr2.Set(1, true);
       barr2.Set(2, false);
       barr2.Set(3, true);
       barr2.Set(4, false);
       Console.WriteLine("BitArray 1");
       for (int i = 0; i < barr1.Count; i++)
       {
           Console.Write(barr1[i]);
           Console.Write(" ");
       }
       Console.WriteLine();
       Console.WriteLine("BitArray 2");
       for (int i = 0; i < barr2.Count; i++)
       {
           Console.Write(barr2[i]);
           Console.Write(" ");
       }
       barr1.Or(barr2);
       Console.WriteLine();
       Console.WriteLine("BitArray after OR operation");
       for (int i = 0; i < barr1.Count; i++)
       {
           Console.Write(barr1[i]);
           Console.Write(" ");   
       }  
     }
  }
}

The output of the above program is as follows:

BitArray 1
True False True True False
BitArray 2
True True False True False
BitArray after OR operation
True True True True False

NOT Operation in BitArray

The Not() method inverts all the elements in the specified BitArray so the true elements are converted to false and the false elements are converted to true. The program that demonstrates this is given as follows:

Source Code: Program to demonstrate NOT operation in BitArray in C#

using System;
using System.Collections;
namespace BitArrayDemo
{
  class Example
  {
     static void Main(string[] args)
     {
       BitArray barr = new BitArray(5);
       barr.Set(0, true);
       barr.Set(1, false);
       barr.Set(2, true);
       barr.Set(3, true);
       barr.Set(4, false);
       Console.WriteLine("BitArray");
       for (int i = 0; i < barr.Count; i++)
       {
           Console.Write(barr[i]);
           Console.Write(" ");            
       }
       barr.Not();
       Console.WriteLine();
       Console.WriteLine("BitArray after NOT operation");
       for (int i = 0; i < barr.Count; i++)
       {
           Console.Write(barr[i]);
           Console.Write(" ");
       }
     }
  }
}

The output of the above program is as follows:

BitArray
True False True True False
BitArray after NOT operation
False True False False True

Check whether the BitArray is ReadOnly or not

Use the IsReadOnly property to check whether the BitArray is ReadOnly or not. If a collection is ReadOnly, then you won’t be able to add new elements to it.

Let us see an example that checks whether the BitArray is ReadOnly or not:

Source Code: Program to check whether the BitArray is ReadOnly or not in C#

using System;
using System.Collections;
namespace BitArrayDemo
{
  class Example
  {
     static void Main(string[] args)
     {
       BitArray bArr = new BitArray(5);
       bArr.Set(0, true);
       bArr.Set(1, false);
       bArr.Set(2, true);
       bArr.Set(3, true);
       for (int i = 0; i < bArr.Count; i++)
       {
           Console.Write(bArr [i]);
           Console.Write(" ");
       }
       Console.WriteLine("\nIsReadOnly? " + bArr.IsReadOnly);
     }
  }
}

The above program gives the following output:

True False True True False
IsReadOnly? False

Get the length of the elements in a BitArray

To get the length of the BitArray elements, use the Length property. Let us see an example:

Source Code: Program to get the length of the BitArray elements in C#

using System;
using System.Collections;
public class Example  {
  public static void Main()  {
     BitArray bArr1 = new BitArray(15);
     BitArray bArr2 = new BitArray(5);
       bArr2.Set(0, true);
       bArr2.Set(1, false);
       bArr2.Set(2, true);
       bArr2.Set(3, true);
       bArr2.Set(4, false);
       for (int i = 0; i < bArr2.Count; i++)
       {
           Console.Write(bArr2 [i]);
           Console.Write(" ");
       }
     Console.WriteLine( "\nLength: {0}", bArr1.Length );
     Console.WriteLine( "Length: {0}", bArr2.Length );
  }
}

The above program gives the following output:

True False True True False
Length: 15
Length: 5

Get the count of the elements in a BitArray

To get the count of the elements in  BitArray, use the Count property. Let us see an example:

Source Code: Program to get the count of the elements in  BitArray in C# 

using System;
using System.Collections;
public class Demo  {
  public static void Main()  {
     BitArray bArr1 = new BitArray( 10 );
     BitArray bArr2 = new BitArray(5);
       bArr2.Set(0, true);
       bArr2.Set(1, false);
       bArr2.Set(2, true);
       bArr2.Set(3, true);
       bArr2.Set(4, false);
       for (int i = 0; i < bArr2.Count; i++)
       {
           Console.Write(bArr2 [i]);
           Console.Write(" ");
       }
     Console.WriteLine( "\nCount: {0}", bArr1.Count );
     Console.WriteLine( "Count: {0}", bArr2.Count );
  }
}

The above program gives the following output:

True False True True False
Count: 10
Count: 5

Fetch a value from a BitArray Collection

In a BitArray collection, you may need to fetch a value. For that, the following is the code. Here, we are displaying a value from the BitArray elements:

Source Code: Program to fetch a value from a BitArray collection in C#

using System;
using System.Collections;
public class Example  {
  public static void Main()  {
     BitArray bArr1 = new BitArray(15);
     BitArray bArr2 = new BitArray(5);
       bArr2.Set(0, true);
       bArr2.Set(1, false);
       bArr2.Set(2, true);
       bArr2.Set(3, true);
       bArr2.Set(4, false);
       for (int i = 0; i < bArr2.Count; i++)
       {
           Console.Write(bArr2 [i]);
           Console.Write(" ");
       }
     Console.WriteLine( "\nLength: {0}", bArr1.Length );
     Console.WriteLine( "Length: {0}", bArr2.Length );
     bool s = bArr2[3];
     Console.WriteLine("4th element ="+s);
  }
}

The above program generated the following output:

True False True True False
Length: 15
Length: 5
4th element =True