List<> ，string[]和string的相互转换

1、string转换成string[]数组

  string str = "aaa,bbb,ccc,dddd";
  string[] strs = str.Split(',');

2、string[]数组转换成List<string>

 string[] str={"str","string","abc"};
 List<string> list=new List<string>(str);

3、List<string>转换成string[]数组

 List<string> list=new List<string>();
 list.Add("hello");
 list.Add("world");
 string[] str=list.ToArray();

4、List<string>转换成string

 List<string> list=new List<string>();
 string strp = string.Join(",", list.ToArray());

5、List<int>转换成List<string>

 List<int> list1 = new List<int>(new int[] { ,, } );
 List<string> list2 = l1.ConvertAll<string>(x => x.ToString());

6、List<string>转换成List<int>

 var list1 =(new[]{"","",""}).ToList();
 var list2 = list1 .Select<string,int>(x =>Convert.ToInt32(x));