Description: WPF separate button, is a solution that can be interested to see, do not forget interest
File list (Check if you may need any files):
49WPF-SplitButton\SplitButton
.................\...........\App.xaml
.................\...........\App.xaml.cs
.................\...........\bin
.................\...........\...\Debug
.................\...........\...\.....\SplitButton.exe
.................\...........\...\.....\SplitButton.pdb
.................\...........\...\.....\SplitButton.vshost.exe
.................\...........\...\.....\SplitButton.vshost.exe.manifest
.................\...........\MainWindow.xaml
.................\...........\MainWindow.xaml.cs
.................\...........\obj
.................\...........\...\x86
.................\...........\...\...\Debug
.................\...........\...\...\.....\App.g.cs
.................\...........\...\...\.....\App.g.i.cs
.................\...........\...\...\.....\DesignTimeResolveAssemblyReferencesInput.cache
.................\...........\...\...\.....\GenerateResource.read.1.tlog
.................\...........\...\...\.....\GenerateResource.write.1.tlog
.................\...........\...\...\.....\MainWindow.baml
.................\...........\...\...\.....\MainWindow.g.cs
.................\...........\...\...\.....\MainWindow.g.i.cs
.................\...........\...\...\.....\SplitButton.csproj.FileListAbsolute.txt
.................\...........\...\...\.....\SplitButton.exe
.................\...........\...\...\.....\SplitButton.g.resources
.................\...........\...\...\.....\SplitButton.pdb
.................\...........\...\...\.....\SplitButton.Properties.Resources.resources
.................\...........\...\...\.....\SplitButton_MarkupCompile.cache
.................\...........\...\...\.....\SplitButton_MarkupCompile.i.cache
.................\...........\...\...\.....\TempPE
.................\...........\Properties
.................\...........\..........\AssemblyInfo.cs
.................\...........\..........\Resources.Designer.cs
.................\...........\..........\Resources.resx
.................\...........\..........\Settings.Designer.cs
.................\...........\..........\Settings.settings
.................\...........\SplitButton.csproj