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

even without [Flags], you could use something like this

if((testItem & (FlagTest.Flag1 | FlagTest.Flag2 ))!=0){
//..
}

or if you have a Zero value enum

if((testItem & (FlagTest.Flag1 | FlagTest.Flag2 ))!=FlagTest.None){
//..
}