Lambda表达式

//查询List是否含有某个值
bool IsContains = Lists.Exists((x)=>x=="B11");

　　

//List重新排序
List<int> arr = new List<int>() { 11, 2, 13, 4, 5, 6, 7 };
//1.
var re =arr.OrderBy(g => g);
//2.
var ree = from g in arr orderby g descending select g; 
 foreach (var item in re)
{
      Console.WriteLine(item);
}
Console.ReadLine();