protected void when_filtering_operations()
 {
     try
     {
         ResultOperation = RequestEntityReader.Read(Operations).GetAwaiter().GetResult().Item2;
     }
     catch (Exception e)
     {
         Error = e;
     }
 }
 protected void when_filtering_operations()
 {
     try
     {
         var result = RequestEntityReader.Read(Operations).GetAwaiter().GetResult();
         SelectedOperation = result.Item2;
         ReadResult        = result.Item1;
     }
     catch (Exception e)
     {
         Error = e;
     }
 }