How to Compare Flags in C#?

Question

I have a flag enum below.

[Flags]
public enum FlagTest
{
    None = 0x0,
    Flag1 = 0x1,
    Flag2 = 0x2,
    Flag3 = 0x4
}

I cannot make

Answer 1

Try this:

if ((testItem & FlagTest.Flag1) == FlagTest.Flag1)
{
    // do something
}

Basically, your code is asking if having both flags set is the same as having one flag set, which is obviously false. The code above will leave only the Flag1 bit set if it is set at all, then compares this result to Flag1.