Delete team project from Visual Studio Team Services

I am using Team Services on domain visualstudio.com and I need to delete one project, I found out that I need to use command prompt to delete projects, but when I tried the script it seemed that it doesn't work

My Script is,

TfsDeleteProject 
  /force collection:https://mytfs.visualstudio.com/DefaultCollection MyProject

My first mistake was that I didn't append DefaultCollection to the URL, but now I get error that I don't have privileges.

Thanks to @Christopher I was able to make the script work.

You can use the following command from the "Developer Command Prompt":

TfsDeleteProject /collection:https://mytfs.visualstudio.com/DefaultCollection MyProject

You can now do it via visualstudio.com

1. Open the administration context for the team project collection by choosing the gear icon.

2. Open the menu for the team project that you want to delete.

If you don’t see the actions icon , either you’re not accessing VSTS or you’re not a member of the Project Collection Administrators group. 3. You must type the name of the team project in order to initiate the delete operation.

1. Open “Developer Command Prompt” under “Program Files>Microsoft Visual Studio” or in Windows 8 type “Developer“.

2. In the command prompt, use this command template below to delete your project from TFS. Replace the YourTFSName to yours and also the ProjectName to the name of your project.

    TfsDeleteProject /collection:https://YourTFSName.visualstudio.com/DefaultCollection ProjectName
   

3. Hit Enter and then Y if you are prompted for confirmation.

4. Done. Double check by login to your TFS online.

From http://bizvise.com/2013/03/08/how-to-delete-team-project-from-my-team-foundation-service-tfs-default-collections/

Although the accepted answer is absolutely correct and very clear, I managed to get lost and run into that 'grayed out Delete button' issue and just wanted to share what I was doing wrong.

For the folks having issue with grayed out delete button, make sure that you are inside 'View the collection administration page' (as shown in the accepted answer), not inside the project itself.

If the last breadcrumb on the top of your VS Team Services is the name of the project, you are at the wrong place (it looks similar). Here the Delete button (appears on right clicking the project name) will be grayed out.

If you click the link that says 'View the collection administration page' after clicking the Settings(gear), you will be at the right place.

if your project name have space, you must use "MyProject name" TfsDeleteProject /collection:https://mytfs.visualstudio.com/DefaultCollection "MyProject name"