字符串 合并、分割

static void Main()
{
    List<string> list1 = new List<string>() { "10000" };

    string str1 = String.Join(",", list1);  //合并
    string[] array1 = str1.Split(',');      //分割



    List<string> list2 = new List<string>() { "10000", "10010", "10086" };

    string str2 = String.Join(",", list2);
    string[] array2 = str2.Split(',');


    Console.ReadLine();
}

 

list1
Count = 1
    [0]: "10000"

str1
"10000"

array1
{string[1]}
    [0]: "10000"



list2
Count = 3
    [0]: "10000"
    [1]: "10010"
    [2]: "10086"

str2
"10000,10010,10086"

array2
{string[3]}
    [0]: "10000"
    [1]: "10010"
    [2]: "10086"