C#

The library is available on NuGet. You can install it using the following command

#Using Package Manager
Install-Package OpenXMLOffice

# For Pre Release
dotnet add package OpenXMLOffice.Presentation

# For Pre Release
dotnet add package OpenXMLOffice.Presentation --prerelease

#Using .NET CLI
dotnet add package OpenXMLOffice.Excel

# For Pre Release
dotnet add package OpenXMLOffice.Excel--prerelease

Package Version Details

C#

The official release NuGet packages for OpenXMLOffice on NuGet.org:

Package	Maintanance	Current Stable Version	Current Alpha Version
OpenXMLOffice.Presentation	Not Active
OpenXMLOffice.Excel	Not Active
OpenXMLOffice.Document	Not Active

Once Installed the package should be direct use availabel like below example. More samples can be seen in test project’s of the repo or check other parts of the documents

C#

using OpenXMLOffice.Presentation;

public static main(){
    PowerPoint powerPoint = new(string.Format("../../test-{0}.pptx", DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss")), null);
    powerPoint.AddSlide(PresentationConstants.SlideLayoutType.BLANK);
    powerPoint.save();
}

C#

using OpenXMLOffice.Excel;

public static main(){
    Spreadsheet spreadsheet = new(string.Format("../../test-{0}.xlsx", DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss")));
    spreadsheet.AddSheet("Sheet1");
    spreadsheet.save();
}