c#列表中的字符串
List<string> names = new List<string>() { "John", "Anna", "Monica" };
string result = string.Join(",", names.ToArray());
c#把名单以字符串
string combindedString = string.Join( ",", myList.ToArray() );
c#建立的串出的列表中的字符串
string.Join(", ", stringCollection); // "Value1, Value2, Value3