Update README.md

Author: sathiskumarKR

README.md

@@ -10,4 +10,8 @@ Online examples: Multi-Sorting : https://blazor.syncfusion.com/demos/datagrid/so
 # Project prerequisites
 Make sure that you have the latest versions of 'Visual Studio 2022' 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 <code>Blazor-DataGrid-Sorting</code> repository and then open it in Visual Studio 2022. Now, simply build and run your project to view the output.
+To run this application, you need to first clone the <code>Blazor-DataGrid-Sorting</code> repository and then open it in Visual Studio 2022.
+
+Register the syncfusion license key in program.cs file, if you have any doubt check the documentation link : https://blazor.syncfusion.com/documentation/getting-started/license-key/how-to-register-in-an-application
+
+Now, simply build and run your project to view the output.