Question

Using reflection, how do I determine whether an enum has the Flags attribute or not

so for MyColor return true

[Flags]
public enum MyColor
{
    Yellow = 1,
    Green = 2,
    Red = 4,
    Blue = 8
}

and for MyTrade return false

public enum MyTrade
{
    Stock = 1,
    Floor = 2,
    Net = 4,
}

Answer 1

If you are on .NET 4.5:

if (typeof(MyColor).GetCustomAttributes<FlagsAttribute>().Any())
{
}