[InvalidOperationException: Showing a modal dialog box or form when the application is not running in UserInteractive mode is not a valid operation. Specify the ServiceNotification or DefaultDesktopOnly style to display a notification from a service application.]
System.Windows.Forms.MessageBox.ShowCore(IWin32Window owner, String text, String caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defaultButton, MessageBoxOptions options, Boolean showHelp) +2996252
System.Windows.Forms.MessageBox.Show(String text) +31
ControlliRegioneLombardia.ClassificazioneClass..ctor(Int32 IdDoc) in C:\Sandro\LavoriInCorso\XNormeRegioneLombardia\ControlliRegioneLombardia\ImportazioneRL.cs:705
ControlliRegioneLombardia.DocumentoRL.get_Classificazioni() in C:\Sandro\LavoriInCorso\XNormeRegioneLombardia\ControlliRegioneLombardia\ImportazioneRL.cs:3835
accessibile_main.visualizzaClassificazioni() in \\file01\nir$\accessibile\main.aspx.cs:2146
accessibile_main.Page_Load(Object sender, EventArgs e) in \\file01\nir$\accessibile\main.aspx.cs:297
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +51
System.Web.UI.Control.OnLoad(EventArgs e) +95
System.Web.UI.Control.LoadRecursive() +59
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +678
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