ClassicAssert.IsAssignableFrom
ClassicAssert.IsAssignableFrom succeeds if the object provided may be assigned a value of the expected type.
ClassicAssert.IsAssignableFrom(Type expected, object actual);
ClassicAssert.IsAssignableFrom(Type expected, object actual,
string message, params object[] params);
ClassicAssert.IsAssignableFrom<T>(object actual);
ClassicAssert.IsAssignableFrom<T>(object actual,
string message, params object[] params);