扩展静态类的扩展方法

public static class MyStaticClass
{
    public static int MyProperty { get; set; }

    public static void MyMethod()
    {
        Console.WriteLine("Hello from MyStaticClass!");
    }
}

public static class MyStaticClassExtensions
{
    public static void MyNewMethod(this MyStaticClass myStaticClass)
    {
        Console.WriteLine("Hello from MyNewMethod!");
    }
}

public static class Program
{
    public static void Main()
    {
        MyStaticClass.MyMethod();
        MyStaticClass.MyNewMethod();
    }
}