Added Customize Menu Items sample

Author: mageshyadavm

Samples/Customize-Menu-Items/Split_Button_Add_Menuitem.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.28307.902
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Split_Button_Menuitems", "Split_Button_Add_Menuitem\Split_Button_Menuitems.csproj", "{BFEBD1A2-9878-44FC-963B-E673B4B9967D}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{BFEBD1A2-9878-44FC-963B-E673B4B9967D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{BFEBD1A2-9878-44FC-963B-E673B4B9967D}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{BFEBD1A2-9878-44FC-963B-E673B4B9967D}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{BFEBD1A2-9878-44FC-963B-E673B4B9967D}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {94812E13-698E-4C92-B136-94B992B6C886}
+	EndGlobalSection
+EndGlobal

Samples/Customize-Menu-Items/Split_Button_Add_Menuitem/App.config

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+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
+    </startup>
+</configuration>

Samples/Customize-Menu-Items/Split_Button_Add_Menuitem/App.xaml

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+<Application x:Class="Split_Button_Menuitems.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+         
+    </Application.Resources>
+</Application>

Samples/Customize-Menu-Items/Split_Button_Add_Menuitem/App.xaml.cs

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+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using System.Data;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace Split_Button_Add_Menuitem
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+    }
+}