如何以编程方式检查类型是结构还是类？

Type type = typeof(MyType);
if (type.IsClass)
{
    Console.WriteLine("MyType is a class.");
}
else if (type.IsValueType)
{
    Console.WriteLine("MyType is a struct.");
}

object obj = new MyClass();
if (obj is MyClass)
{
    Console.WriteLine("obj is an instance of MyClass.");
}
else if (obj is MyStruct)
{
    Console.WriteLine("obj is an instance of MyStruct.");
}