Compare PDF Files and Highlight Differences using GroupDocs.Comparison for C# API

ComparePDFFiles_CSharp

Compare PDF Files using C#
1. Compare Two PDF Files using C#
2. Compare Password Protected PDF Files using C#

ComparePDFFiles_CSharp_ComparePasswordProtectedFiles.cs

using (Comparer comparer = new Comparer("C:\\Files\\source.pdf", new LoadOptions() { Password = "1234" }))
{
    comparer.Add("C:\\Files\\target.pdf", new LoadOptions() { Password = "5678" });
    comparer.Compare("C:\\Files\\result.pdf");
}

ComparePDFFiles_CSharp_CompareTwoPDFs.cs

using (Comparer comparer = new Comparer("C:\\Files\\source.pdf"))
{
    comparer.Add("C:\\Files\\target.pdf");
    comparer.Compare("C:\\Files\\result.pdf");
}