c# - Show Form depending on database condition -

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on initial startup of application looking check whether table within database has tuples within it, if condition true not want adddialog form show when false show it. appreciated.

this have tried: 

private void home_loaded_1(object sender, routedeventargs e) {     //addsafelimits dialog = new addsafelimits();     //dialog.show();      var query = level in context.safelimits                     level.upperlimit == null                     select level;      levels = query.tolist();      if (levels== null)     {         addsafelimits dialog = new addsafelimits();         dialog.show();     } }

i think linq return empty instead of null can try use:

if (levels== null||levels.count==0)         {             addsafelimits dialog = new addsafelimits();             dialog.show();         }

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