Update the Readme file

Author: saravanangn

README.md

@@ -1,2 +1,9 @@
 # Multi-column-ComboBox-Blazor
-Multi-column ComboBox has an option to display the data in a multi-column layout using the templates
+Multi-column ComboBox has an option to display the data in a multi-column layout using the template features.It displays the list item in multiple column like Grid view.
+## Project pre-requisites
+Make sure that you have the compatible versions of Visual Studio Code and .NET Core SDK 3.1.2 in your machine before starting to work on this project.
+
+## How to run this application?
+To run this application, you need to first clone the `Multi-column-ComboBox-Blazor` repository and then open the project or solution file in Visual Studio 2019. 
+
+* Now, run the run the project Visual Studio and able to get the output in Browser.