There is require installing of DocumentFormat.OpenXml from nuget in visual studio or download DocumentFormat.OpenXml.dll and use in the project. Below is the code for reading Excel file and stored data in dataset. Namespaces: using DocumentFormat.OpenXml;using DocumentFormat.OpenXml.Packaging;using DocumentFormat.OpenXml.Spreadsheet;using System;using System.IO;using System.Collections.Generic;using System.Data;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Configuration;using System.Text.RegularExpressions; Method for Reading EXCEL file public static DataSet ReadExcelFile(string…

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