A major advantage of GroupDocs.Comparison for .NET is its ability to tightly integrate with any .NET project. This integration gives an extra mark to your application or project. GroupDocs.Comparison for .NET 19.9 comes with a lot of breaking changes. The legacy API have been moved into Legacy namespace**.** So, when you update to this version it is required to make project-wide replacement of namespace usages from GroupDocs.Comparison. to GroupDocs.Comparison.Legacy to resolve build issues....9: Comparer class introduced as a single...single entry point to compare documents of any supported file format...