Added sample for WPF DataGrid KB samples

Author: Backiaraj

How-to-bind-a-column-collection-from-view-model-in-wpf-datagrid/README.md

@@ -0,0 +1,5 @@
+# How to bind a column collection from view model in WPF DataGrid (SfDataGrid)?
+
+This sample show cases how to bind a column collection from view model in [WPF DataGrid](https://www.syncfusion.com/wpf-ui-controls/datagrid) (SfDataGrid).
+
+You can bind the [SfDataGrid.Columns](https://help.syncfusion.com/cr/wpf/Syncfusion.UI.Xaml.Grid.SfDataGrid.html#Syncfusion_UI_Xaml_Grid_SfDataGrid_Columns) to a property in the ViewModel by having the binding property to be of type Syncfusion.SfGrid.UI.Xaml.Grid.Columns. So, you can set binding to the `SfDataGrid.Columns` property provided the DataContext of the [WPF DataGrid](https://www.syncfusion.com/wpf-ui-controls/datagrid) (SfDataGrid) is ViewModel.

How-to-bind-a-column-collection-from-view-model-in-wpf-datagrid/UWP/ColumnCollection/App.xaml

@@ -0,0 +1,14 @@
+<Application x:Class="SfDataGridDemo.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="using:SfDataGridDemo"
+             xmlns:syncfusion="using:Syncfusion.UI.Xaml.Grid"
+             RequestedTheme="Light">
+
+    <Application.Resources>
+        <Style x:Key="cellStyle" TargetType="syncfusion:GridCell">
+            <Setter Property="Foreground" Value="Red" />
+        </Style>
+    </Application.Resources>
+
+</Application>

How-to-bind-a-column-collection-from-view-model-in-wpf-datagrid/UWP/ColumnCollection/App.xaml.cs

@@ -0,0 +1,108 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Runtime.InteropServices.WindowsRuntime;
+using Windows.ApplicationModel;
+using Windows.ApplicationModel.Activation;
+using Windows.Foundation;
+using Windows.Foundation.Collections;
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Controls.Primitives;
+using Windows.UI.Xaml.Data;
+using Windows.UI.Xaml.Input;
+using Windows.UI.Xaml.Media;
+using Windows.UI.Xaml.Navigation;
+
+namespace SfDataGridDemo
+{
+    /// <summary>
+    /// Provides application-specific behavior to supplement the default Application class.
+    /// </summary>
+    sealed partial class App : Application
+    {
+        /// <summary>
+        /// Initializes the singleton application object.  This is the first line of authored code
+        /// executed, and as such is the logical equivalent of main() or WinMain().
+        /// </summary>
+        public App()
+        {
+            Microsoft.ApplicationInsights.WindowsAppInitializer.InitializeAsync(
+                Microsoft.ApplicationInsights.WindowsCollectors.Metadata |
+                Microsoft.ApplicationInsights.WindowsCollectors.Session);
+            this.InitializeComponent();
+            this.Suspending += OnSuspending;
+        }
+
+        /// <summary>
+        /// Invoked when the application is launched normally by the end user.  Other entry points
+        /// will be used such as when the application is launched to open a specific file.
+        /// </summary>
+        /// <param name="e">Details about the launch request and process.</param>
+        protected override void OnLaunched(LaunchActivatedEventArgs e)
+        {
+
+#if DEBUG
+            if (System.Diagnostics.Debugger.IsAttached)
+            {
+                this.DebugSettings.EnableFrameRateCounter = true;
+            }
+#endif
+
+            Frame rootFrame = Window.Current.Content as Frame;
+
+            // Do not repeat app initialization when the Window already has content,
+            // just ensure that the window is active
+            if (rootFrame == null)
+            {
+                // Create a Frame to act as the navigation context and navigate to the first page
+                rootFrame = new Frame();
+
+                rootFrame.NavigationFailed += OnNavigationFailed;
+
+                if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
+                {
+                    //TODO: Load state from previously suspended application
+                }
+
+                // Place the frame in the current Window
+                Window.Current.Content = rootFrame;
+            }
+
+            if (rootFrame.Content == null)
+            {
+                // When the navigation stack isn't restored navigate to the first page,
+                // configuring the new page by passing required information as a navigation
+                // parameter
+                rootFrame.Navigate(typeof(MainPage), e.Arguments);
+            }
+            // Ensure the current window is active
+            Window.Current.Activate();
+        }
+
+        /// <summary>
+        /// Invoked when Navigation to a certain page fails
+        /// </summary>
+        /// <param name="sender">The Frame which failed navigation</param>
+        /// <param name="e">Details about the navigation failure</param>
+        void OnNavigationFailed(object sender, NavigationFailedEventArgs e)
+        {
+            throw new Exception("Failed to load Page " + e.SourcePageType.FullName);
+        }
+
+        /// <summary>
+        /// Invoked when application execution is being suspended.  Application state is saved
+        /// without knowing whether the application will be terminated or resumed with the contents
+        /// of memory still intact.
+        /// </summary>
+        /// <param name="sender">The source of the suspend request.</param>
+        /// <param name="e">Details about the suspend request.</param>
+        private void OnSuspending(object sender, SuspendingEventArgs e)
+        {
+            var deferral = e.SuspendingOperation.GetDeferral();
+            //TODO: Save application state and stop any background activity
+            deferral.Complete();
+        }
+    }
+}

How-to-bind-a-column-collection-from-view-model-in-wpf-datagrid/UWP/ColumnCollection/ApplicationInsights.config

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ApplicationInsights xmlns = "http://schemas.microsoft.com/ApplicationInsights/2013/Settings">
+</ApplicationInsights>