Modified the readme content

Author: Backiaraj

README.md

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+# Export Data to Excel in Blazor Application
+
+This sample explains about how to export the data to excel in Blazor server or client side application.
+
+## Prerequisites
+
+* Visual Studio 2022
+
+## How to run the project
+
+* Checkout this project to a location in your disk.
+* Open the solution file using the Visual Studio 2022.
+* Restore the NuGet packages by rebuilding the solution.
+* Run the project.