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a guest Jun 25th, 2019 58 Never
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  1. var dictionary = new Dictionary<string, string>();
  2. var val = dictionary["mykey"];
  3.      
  4. string val;
  5. if(dictionary.TryGetValue("mykey", out val))
  6. {
  7.      //The key was found. The value is in val.
  8. }
  9. else
  10. {
  11.     //The key was not present.
  12. }
  13.      
  14. private void Application_UnhandledException(object sender,
  15.         ApplicationUnhandledExceptionEventArgs e)
  16.     {
  17.          var stackTrace = e.ExceptionObject.StackTrace;
  18.          //Log the stackTrace somewhere.
  19.     }
  20.      
  21. private void Application_UnhandledException(object sender,
  22.         ApplicationUnhandledExceptionEventArgs e)
  23.     {
  24.          if (e.ExceptionObject is KeyNotFoundException)
  25.          {
  26.              //This was a KeyNotFoundException
  27.          }
  28.     }
  29.      
  30. public static TValue GetOrThrow<TKey,TValue>(this IDictionary<TKey,TValue> d, TKey key)
  31. {
  32.     try
  33.     {
  34.         return d[key];
  35.     }
  36.     catch(KeyNotFoundException ex)
  37.     {
  38.         throw new KeyNotFoundException(key.ToString()
  39.             + " was not found in the dictionary");  
  40.     }  
  41. }
  42.      
  43. var serializedKey = Newtonsoft.Json.JsonConvert.SerializeObject(
  44.     key,
  45.     new JsonSerializerSettings
  46.     {
  47.         //make it easy for humans to read
  48.         Formatting = Formatting.Indented,
  49.         //don't break on loops...that would cause a new error that hides the KeyNotFound!
  50.         ReferenceLoopHandling = ReferenceLoopHandling.Ignore
  51.     });
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