You can use to Diff/Merge tool to view differences between versions of files in a change set and previous versions of the same files. To do so:
Select a change set in the Configuration Manager and choose Differences > Show Differences...
.
A Show Differences dialog appears, in which you can select the type of differences (two-
way or three-way) that you want to see.
Press the 2-Way button. (For three-way differences please refer to Showing and merging
three way differences.)
A Diff/Merge tool appears. Differences between files in the change set and previous
versions are shown in the tool.
The File List displays the files in the change set. By clicking on a file in the list, you can
look at the changes between it and its previous version.