|= Operator (C# Reference)

The OR assignment operator.

Remarks

An expression using the |= assignment operator, such as

x |= y

is equivalent to

x = x | y

except that x is only evaluated once. The | operator performs a bitwise logical OR operation on integral operands and logical OR on bool operands.

The |= operator cannot be overloaded directly, but user-defined types can overload the | operator (see operator).

Example

    class MainClass7
    {
        static void Main()
        {
            int a = 0x0c;
            a |= 0x06;
            Console.WriteLine("0x{0:x8}", a);
            bool b = true;
            b |= false;
            Console.WriteLine(b);
        }
    }
    /*
    Output:
    0x0000000e
    True
    */

See Also

Reference

C# Operators

Concepts

C# Programming Guide

Other Resources

C# Reference