Spreadsheets are commonly used for storing small or large-scale data in the form of rows and columns. Various applications are available to create and manipulate spreadsheets, of which MS Excel is a popular one. Alongside, Google provides Google Sheets, which is used to create and update spreadsheets online. In addition, Google Sheets lets you share the spreadsheets with multiple people in real-time. In certain cases, you may need to export data from Excel XLS or XLSX files to a spreadsheet in Google Sheets programmatically. So let’s see how you can read data from an Excel file and write it to Google Sheets’ spreadsheet in C# .NET.