|= 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
*/