Fix crash in System.Collections.Generic.Dictionary`2.Insert

[OpportunityLiu]

Version: 2016.9.20.0 | ExViewer

Stacktrace

System.Collections.Generic.Dictionary`2;Insert;;
ExViewer.Views.RootControl.;ctor;;
ExViewer.Views.SplashControl.d__4;MoveNext;;
System.Runtime.CompilerServices.AsyncMethodBuilderCore.<>c;b__6_0;;
System.Threading.WinRTSynchronizationContext.Invoker;InvokeCore;;
Windows.ApplicationModel.Core.UnhandledError;Propagate;;
Microsoft.HockeyApp.Extensibility.Windows.UnhandledExceptionTelemetryModule;CoreApplication_UnhandledErrorDetected;;

Reason

Value cannot be null. Parameter name: key

Link to HockeyApp

• https://rink.hockeyapp.net/manage/apps/339042/crash_reasons/137039711