Update README.md

Author: abooarulraj

README.md

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-# customize-treeview-items-using-a-template-and-cssclass-property
+# Customize TreeView Items Using a Template and CssClass property
+
+A quick-start project that helps you customize Syncfusion Blazor TreeView items easily using a template and the CssClass property in a WebAssembly app. You will learn how to use the context property and access the data fields showcasing the employee details with their images and designations.
+
+Watch the video now: Coming soon...
+
+Documentation: https://blazor.syncfusion.com/documentation/treeview/template 
+Online example: https://blazor.syncfusion.com/demos/treeview/template
+
+## Project prerequisites
+Make sure you have a compatible version of .NET Core on your machine before starting to work on this project. You will also need the following:
+* [Visual Studio 2019 (version 16.6+)]( https://visualstudio.microsoft.com/downloads)
+* [.NET Core SDK 3.1.3+](https://dotnet.microsoft.com/download/dotnet-core/3.1)
+
+## How to run this application
+To run this application, you need to first clone or download the ‘customize treeview items using a template and cssclass property’ repository and then open it in Visual Studio 2019. Now, build and run your project to view the output.
+
+## Further help
+
+To get more help, check the [ASP.NET Core Blazor documentation](https://docs.microsoft.com/en-us/aspnet/core/blazor).