Creating a Patch with TFS

Creating a patch is very easy in SubVersion, With Tortoise, you right-click and select Create Patch. But for the life of me, I can't find this functionality in TFS. Is this possible?

If not, what's the standard way to submit patches in open source TFS hosted projects (a la CodePlex)?

From stackoverflow swilliams

• tf diff /shelveset:shelveset /format:unified
  

  Edit: This writes to standard output. You can pipe the output to a file.

  Doron Yaacoby : Can you explain a bit more? 1. How would you apply this patch? 2. Also, if the project is read-only to the patcher, he can't create a shelveset, can he?

  Curt Hagenlocher : There's a standard UNIX program called "patch" that applies unified diffs to source trees. I'm sure you could find a Windows implementation, or you could use Cygwin.
  From Curt Hagenlocher

• Codeplex uses is own client for creating patches see: http://www.codeplex.com/CodePlexClient/Wiki/View.aspx?title=HowToContribute&referringTitle=Home

  From Edward Wilde

• Curt, can that create a separate file (like SubVersions .patch)?

  Edward, thanks, but I would love to do that without having to download yet another app. And yes, I'm being nitpicky.

  From swilliams

• Because TFS doesn't natively support patch files, the most common thing I see people do on CodePlex is simply zip the modified files and upload the zip. The project coordinator then does a diff against their own checkout.

  However since CodePlex also supports TortoiseSVN, more and more people are using that to create their patch files.

  From jwanagel