Can I compress an if statement using linq in C#?

Question

In sql, I can make an if statement like the following If MY_STATE in (1,2,3,4)

In C# I have to type if(MY_STATE == STATE.CT || MY_STATE == STATE.MA || MY_STATE == ST

Answer 1

You could use an extension method:

public static class ExtensionMethods
{
    public static bool EqualsAny(this T comparer, params T[] values)
    {
        foreach (T t in values)
            if (comparer.Equals(t))
                return true;

        return false;
    }
}

and use it like:

if (myState.EqualsAny(State.CT, State.MA, State.VA, State.RI)) 
{
    // ...
}