/// <summary>
/// 获取编码。随机数
/// </summary>
/// <returns></returns>
public static string GetNumber2(int Length = 10)
{
byte[] buffer = Guid.NewGuid().ToByteArray();
var ram = BitConverter.ToInt64(buffer, 0);
var str = string.Format("{0}", ram.ToString().Substring(0, Length));
return str;
}