c#查找string数组的某一个值的索引
string[] array = { "A","B","C","D","H"};
var index=array.ToList().IndexOf("D");
使用IndexOf()方法，返回数组元素在数组中的索引。
index=3;
string[] array = { "A","B","C","D","H"};
var index=array.ToList().IndexOf("D");
index=3;