c# List Sort排序

Test test1 = new Test();
test1.sortIndex = 1;
test1.name = "1";

Test test2 = new Test();
test2.sortIndex = 2;
test2.name = "2";

Test test3 = new Test();
test3.sortIndex = 3;
test3.name = "3";

Test test4 = new Test();
test4.sortIndex = 4;
test4.name = "4";

List<Test> list = new List<Test>();
list.Add(test4);
list.Add(test1);
list.Add(test2);
list.Add(test3);

list.Sort((a, b) => {
var o = a.sortIndex - b.sortIndex;
return o;
});

这里是用

Comparison委托

Comparison委托的定义如下：public delegate int Comparison<in T>(T x, T y);

使用委托，可以传递一个与委托签名相同的函数，可以使用匿名委托，还可以用Lambda表达式