Do you want to compare documents with all small details? Have a look at the following .NET code:

Comparercomparer=new.Comparer(sourcePath);comparer.Add(targetPath);CompareOptionscompareOptions=newCompareOptions();StyleSettingschangedStyleSettings=newStyleSettings();changedStyleSettings.HighlightColor=Color.Red;compareOptions.ChangedItemStyle=changedStyleSettings;comparer.Compare(@"D:\result.docx",compareOptions);

This is not it. This document comparison API provides a lot of comparison options and support for multiplefile formats. The changes detection algorithms used byGroupDocs.Comparison allows to detect changes in different document parts and blocks.
From style changes (e.g. italic, bold, highlighted text) to the item insertion or deletion, everything will be compared.
Have a look at the following screenshot: