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    System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection  owningConnection,  TaskCompletionSource`1  retry,  DbConnectionOptions  userOptions,  DbConnectionInternal  oldConnection,  DbConnectionInternal&  connection)  +941

    System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection  outerConnection,  DbConnectionFactory  connectionFactory,  TaskCompletionSource`1  retry,  DbConnectionOptions  userOptions)  +143

    System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection  outerConnection,  DbConnectionFactory  connectionFactory,  TaskCompletionSource`1  retry,  DbConnectionOptions  userOptions)  +17

    System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1  retry)  +139

    System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1  retry)  +448

    System.Data.SqlClient.SqlConnection.Open()  +130

    NewFolder1.Class1.user(String  ipkey,  String  rz,  Int32  cl)  +154

    WebApplication1.api.ProcessRequest(HttpContext  context)  +499

    System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()  +814

    System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep  step)  +132

    System.Web.HttpApplication.ExecuteStep(IExecutionStep  step,  Boolean&  completedSynchronously)  +73

    °æ±¾ÐÅÏ¢:  Microsoft  .NET  Framework  °æ±¾:4.0.30319;  ASP.NET  °æ±¾:4.8.4110.0