git diff mybranch master — myfile.cs<br />

# If the two files have different paths in each branch</p> <p>git diff branch1:path/to/file branch2:path/to/file

Just specify your local branch1 or remote origin/branch2<br /> git diff branch1 origin/branch2 #show diff referenced from second branch<br /> git diff branch1 branch2 file.txt #show diff only between file.txt