委托、Lambda表达式

public int Add(int a,int b)
{
       return a + b;
 }
 
 public int M1(Func<int,int,int> func,int a,int b)
 {
        var result = func(a,b);
        return result;
  }
 
Func<int,int,int> addMethod = Add;
Func<int, int, int> addMethod1 = delegate(int a, int b) { return a + b; };
Func<int, int, int> addMethod2 = (a, b) => { return a + b; };
 
M1(delegate(int a, int b) { return a + b; }, 3, 5);
 
IQueryable Where方法：
IQueryable<User> user = null;
var result= user.Where(delegate(User u) { return u.Name == "LBI"; });