We’re happy to announce the release of GroupDocs.Comparison for .NET 26.1, available as of January 2026.
GroupDocs.Comparison version 26.1 includes multiple improvements to strengthen performance and stability.

Fixes and enhancements

  • [Enhancement] Improved document preview functionality. (COMPARISONNET-4511)
  • [Enhancement] Added dimension settings to preview functionality. (COMPARISONNET-4294)

Major Features

Added dimension settings to preview functionality

When previewing a file, you can now specify dimension settings using the Resolution option.

string sourcePath = @"source.pdf";

using (Comparer comparer = new Comparer(sourcePath))
{
    ReleasePageStream releasePageStreamDelegate = delegate (int number, Stream stream)
    {
        stream.Close();
    };

    PreviewOptions previewOptions = new PreviewOptions(pageNumber =>
    {
        string outputFolder = @"c:\Temp";
        var pagePath = Path.Combine(outputFolder, $"result_{pageNumber}.png");
        return File.Create(pagePath);
    },
    releasePageStreamDelegate);

    previewOptions.PreviewFormat = PreviewFormats.PNG;
    previewOptions.PageNumbers = new int[] {2,3};
    previewOptions.Resolution = new PreviewResolution()
    {
        HorizontalResolution = 300,
        VerticalResolution = 300
    };
    
    comparer.Source.GeneratePreview(previewOptions);
}

How to get the update

You can get the latest version from NuGet or download it directly from the GroupDocs website.

NuGet

GroupDocs.Comparison for .NET 26.1

Direct download

Download assemblies for both .NET and .NET Framework from the GroupDocs.Comparison for .NET 26.1 page.

Learn more