A symbol package crated with "nuget pack -symbols" can't be uploaded to symbolsource.org if the package contains WPF/XAML controls. When analyzing or uploading the package it complains about missing files.
When looking at the content of the package, only the MapTile.xaml.cs file is in the package, but the analyzer insists that MapTile.xaml and MapTile.g.cs should be included, too.
The source of the project where this happens can be downloaded at https://tomstoolbox.codeplex.com/SourceControl/latest