我在京东云申请了个免费的MONGO数据库，可是为什么操作时总是提示
“由于连接方在一段时间后没有正确答复或连接的主机没有反应，连接尝试失败。”
MongoDB.Driver.MongoServerSettings DBSet = new MongoDB.Driver.MongoServerSettings();
MongoDB.Driver.MongoConnectionStringBuilder SB = new MongoDB.Driver.MongoConnectionStringBuilder();
SB.Username = Username;
SB.Password = Password;
SB.Server = new MongoDB.Driver.MongoServerAddress("10.0.31.21", 27017);
SB.DatabaseName = DBname;
MongoDB.Driver.MongoServer DBServer = MongoDB.Driver.MongoServer.Create(ConStr);
MongoDB.Driver.MongoDatabase DB = DBServer.GetDatabase(DBname);
UserData User = new UserData();
User.Test1 = "test";
User.Test2 = "12345";
DB.CreateCollection("UserData");
MongoDB.Driver.MongoCollection Col = DB.GetCollection("UserData");
Col.Insert(User.GetType, User);
------解决思路----------------------
SB.Server = new MongoDB.Driver.MongoServerAddress("10.0.31.21", 27017)
把地址换成域名试试