C#生成指定长度随机数

public static string GetRandomString(int iLength)
{
    string buffer = "0123456789";// 随机字符中也可以为汉字（任何）
    StringBuilder sb = new StringBuilder();
    Random r = new Random();
    int range = buffer.Length;
    for (int i = 0; i < iLength; i++)
    {
        sb.Append(buffer.Substring(r.Next(range),1));
    }
    return sb.ToString();
}

 借鉴原文：https://blog.csdn.net/sds15732622190/article/details/51426527