File list (Check if you may need any files):
WpfSingleInstance
.................\App.xaml
.................\App.xaml.cs
.................\Properties
.................\..........\AssemblyInfo.cs
.................\..........\Resources.Designer.cs
.................\..........\Resources.resx
.................\..........\Settings.Designer.cs
.................\..........\Settings.settings
.................\SingleInstance.cs
.................\Window1.xaml
.................\Window1.xaml.cs
.................\WpfSingleInstance.csproj
.................\WpfSingleInstance.sln