优化connection 在并发情况下会出现异常

AutoTurnOver.DB/Base/connectionHelper.cs

@@ -8,16 +8,17 @@ namespace AutoTurnOver.DB
 {
     public class connectionHelper
     {
-        private static MySqlConnection connection = new MySqlConnection("server=gz-cdb-hqmznu0w.sql.tencentcdb.com;database=bailun_datacenter;uid=root;password=#7kfnymAM$Y9-Ntf;port=63523;Convert Zero Datetime=True;Allow User Variables=True");
+        //private static MySqlConnection connection = new MySqlConnection("server=gz-cdb-hqmznu0w.sql.tencentcdb.com;database=bailun_datacenter;uid=root;password=#7kfnymAM$Y9-Ntf;port=63523;Convert Zero Datetime=True;Allow User Variables=True");
 
         public static MySqlConnection _connection
         {
             get {
-                if (connection.State == System.Data.ConnectionState.Closed)
-                {
-                    connection.Open();
-                }
-                return connection;
+                //if (connection.State == System.Data.ConnectionState.Closed)
+                //{
+                //    connection.Open();
+                //}
+                //return connection;
+                return new MySqlConnection("server=gz-cdb-hqmznu0w.sql.tencentcdb.com;database=bailun_datacenter;uid=root;password=#7kfnymAM$Y9-Ntf;port=63523;Convert Zero Datetime=True;Allow User Variables=True");
             }
         }
     }