//匿名函数
Func<int, int, int> s1 = delegate(int a, int b)
{
return a + b;
};
int num =s1(1,2);
int sum = 20;
lambda表达式
Func<int, int,int> s1 =(a1,a2)=>{
return a1+sum;
};
Console.WriteLine(s1(5,2));