Added README file.

Author: abooarulraj

README.md

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+# How to Handle Server-Side Data Editing in Angular TreeGrid 
+
+Learn how you can handle server-side data editing in the Syncfusion Angular TreeGrid control.
+This example explains data binding using a remote call. You’ll see how to insert, update, and remove a record and delete multiple records using the Syncfusion DataManager. An ASP.NET Core web application with Angular as its front-end is used to explain these CRUD operations in the Angular TreeGrid.
+
+Documentation: https://ej2.syncfusion.com/angular/documentation/treegrid/edit/#url-adaptor 
+
+
+## Project prerequisites
+Make sure that you have the compatible versions of TypeScript, Angular and .NET Core in your machine before starting to work on this project:
+* Angular 4+
+* TypeScript 2.6+
+* .NET Core 2.1+
+
+## How to run this application
+To run this application, you need to first clone the ` How-to-handle-server-side-data-editing-in-Angular-Tree-Grid` repository and then navigate to the path where it has been stored in your system.
+
+To do so, open the command prompt and run the below commands one after the other.
+
+git clone https://github.com/SyncfusionExamples/How-to-handle-server-side-data-editing-in-Angular-Tree-Grid treegrid-example
+
+## Installation
+Once done with downloading, you need to install the packages required to run this application locally. To do so, open the solution file ‘ServerSideEditing.sln’ in Visual Studio 2017+ and build the application using keys Ctrl+Shift+B
+
+This will install all the needed Angular packages into your current project.
+
+## Running on a development server
+Run the application using the key F5. This will open the application in the browser.
+
+## Further help
+
+To get more help with the Angular CLI, use `ng help` or check out the [Angular CLI README](https://github.com/angular/angular-cli/blob/master/README.md).