Rajeev Pentyala – Technical Blog on Power Platform, Azure and AI

Other day I got below error while executing my application.

A first chance exception of type ‘System.Windows.Markup.XamlParseException’ occurred in System.Windows.ni.dll

The exception was in ‘App.xaml.cs’ file’s InitializeComponent() method

Reason –

• There could be many reasons for the exception
• Even if there is an invalid space in your xaml file it throws the exception

Fix –

• To get the exact reason for the issue, add the exception in your ‘Debug’
  • Debug->Exceptions
  • Press Add and type in, “System.Windows.Markup.XamlParseException” and select Common Language Runtime Exceptions

• Run the application
• It will pinpoint the exact reason for the exception
• In my case I had an empty space in my xaml file

🙂