The Bitwise XOR and assignment operator (^=) assigns the first operand a value equal to the result of Bitwise XOR operation of two operands.

(x ^= y) is equivalent to (x = x ^ y)

The Bitwise XOR operator (^) is a binary operator which takes two bit patterns of equal length and performs the logical exclusive OR operation on each pair of corresponding bits. It returns 1 if only one of the bits is 1, else returns 0.

Bit_1Bit_2Bit_1 ^ Bit_2
000
101
011
110

The below example describes how bitwise XOR operator works:

```50 ^ 25 returns 16

50    ->    110010  (In Binary)
^ 25    ->  ^ 011001  (In Binary)
----        --------
43    <-    101011  (In Binary)
```

The code of using Bitwise XOR and assignment operator (^=) is given below:

```using System;

class MyProgram {
static void Main(string[] args) {
int x = 50;
int y = 25;

//Bitwise XOR and assignment operation
x ^= y;

//Displaying the result
Console.WriteLine("x = "+x);
}
}
```

The output of the above code will be:

```x = 43
```

### Example: Swap two numbers without using temporary variable

The bitwise XOR and assignment operator can be used to swap the value of two variables. Consider the below example.

```using System;

class MyProgram {
static void swap(int x, int y) {
Console.WriteLine("Before Swap.");
Console.WriteLine("x = " + x);
Console.WriteLine("y = " + y);

//Swap technique
x ^= y;
y ^= x;
x ^= y;

Console.WriteLine("After Swap.");
Console.WriteLine("x = " + x);
Console.WriteLine("y = " + y);
}

static void Main(string[] args) {
swap(10, 25);
}
}
```

The above code will give the following output:

```Before Swap.
x = 10
y = 25
After Swap.
x = 25
y = 10
```

❮ C# - Operators