What is the operator `|=`? How can I implement this in C#?

Question

What is the C++ code below doing? More specifically, what is the operator |=?

long liFaultFlags = 0;

for (int i = 0; i < FAULTCOUNT; i++)
{
         


        

Answer 1

The operator |= does bitwise OR and assignment rolled into one (much like += does integer addition and assignment together).

It's exactly the same in C#.

Answer 2

It is the bitwise OR operator and is equivalent to

liFaultFlags = liFaultFlags | (1<<i);

You would write that line in exactly the same way in C#.