public class Person
{
    public int Id { get; set; }
    public string Name { get; set; }
    public int Age { get; set; }
    public string Title { get; set; }
}

/// <summary>
/// 传递一个泛型委托方法
/// </summary>
/// <param name="action"></param>
public static void SetNum(Action<Person> action)
{
    Person person = new Person();
    //前面的代码
    //......
    action(person);
    //后面的代码 
    //......
}

static void Main(string[] args)
{
    //第一种写法(写一个方法，然后当参数传进来)
    SetNum(Set1);
    //第二种写法(声明一个委托变量，赋一个匿名方法，然后当参数传进来)
    Action<Person> action = delegate(Person person) { person.Name = "Tom"; };
    SetNum(action);
    //第三种写法(直接new出一个泛型Action，然后赋一个匿名方法，全写)
    SetNum(new Action<Person>(delegate(Person person) { person.Name = "Name"; }));
    //第四种写法(直接new出一个匿名方法，简写版)
    SetNum(delegate(Person person) { person.Name = "Name"; });
}

public static void Set1(Person person)
{
    person.Name = "Name";
}