问是否有将Func<T>和Action<T>的功能结合起来的委托？

EN

var myAction = new Action<string>(param =>
{
    Console.WriteLine("This is my param: '{0}'.", param);
});

myAction("Foo");

// Outputs: This is my param: 'Foo'.

var myFunc = new Func<string>(() =>
{
    return "Bar";
});

Console.WriteLine("This was returned from myFunc: '{0}'.", myFunc());

// Outputs: This was returned from myFunc: 'Bar'.

var fooDeletegate = new FooDelegate<string, int>(theInputInt =>
{
    return "The Answer to the Ultimate Question of Life, the Universe, and Everything is " + theInputInt;
});

Console.WriteLine(fooDeletegate(42));

// Outputs: The Answer to the Ultimate Question of Life, the Universe, and Everything is 42