ES-975464 - Resolve the ReadMe file length issue in this sample repository

Author: SreemonPremkumarM

README.md

@@ -1,2 +1,17 @@
 # How to localize the drag and drop window text in treegrid?
-This example illustrates how to localize the drag and drop window text in treegrid
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+This example illustrates how to localize the drag and drop window text in [WPF TreeGrid](https://www.syncfusion.com/wpf-controls/treegrid) and [UWP TreeGrid](https://www.syncfusion.com/uwp-ui-controls/treegrid).
+
+To localize the TreeGrid, drag and drop window based on CurrentUICulture using resource files, follow the below steps.
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+1. Create new folder and named as `Resources` in your application. 
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+2. Add the default resource file of treegrid into `Resources` folder.
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+3. Right-click on the `Resources` folder, select Add and then NewItem.
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+4. In Add New Item wizard, select the Resource File option and name the filename as Syncfusion.SfGrid.WPF.<Culture_Name>.resx for WPF and Syncfusion.SfGrid.UWP.Resources.<Culture_Name>.resw for UWP. For example, you have to give name as `Syncfusion.SfGrid.WPF.de.resx` / `Syncfusion.SfGrid.UWP.Resources.de.resw` for German culture.
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+5. The culture name that indicates the name of language and country.
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+6. Add the Name/Value pair in Resource Designer of `Syncfusion.SfGrid.WPF.de.resx` / `Syncfusion.SfGrid.UWP.Resources.de.resw` file and change its corresponding value to corresponding culture.