public static T GetValue<T>(T defaultValue)

{

  // Need to use typeof to get a Type object for bool, just as with T

  if (typeof(T) == typeof(bool)) {

    // Need to say "get out of my way C#"

    // The first cast to object is required as true (bool) is

    // otherwise not castable to an unrestricted T.

    // This widen-restrict approach could result in a cast error,

    // but from the above check it is known that T is bool.

    return (T)(object)true;

  }

  // .. other stuff that .. does stuff.

}

public static T GetValue<T>(T defaultValue)

{

  if (T is bool) // <-- what is the correct syntax here?

    return (T)true; // <-- I don't think this works either

}