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

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

long liFaultFlags = 0;

for (int i = 0; i < FAULTCOUNT; i++)
{
    if (faults[i] == true)
    {
        liFaultFlags |= (1 <&l开发者_运维技巧t; i);
    }
}

return liFaultFlags;

How would this be implemented in C#?

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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#.

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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#.