[NullReferenceException: Object reference not set to an instance of an object.]
TypeUtils.InvokeDataTableMethod3(String assemblyName, String namespaceName, String typeName, String methodName) +137
MasterPage.Page_Init(Object sender, EventArgs e) in c:\DB\tvh.vn\MasterPage.master.cs:322
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +51
System.Web.UI.Control.OnInit(EventArgs e) +95
System.Web.UI.UserControl.OnInit(EventArgs e) +83
System.Web.UI.Control.InitRecursive(Control namingContainer) +139
System.Web.UI.Control.InitRecursive(Control namingContainer) +312
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +408
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