I have about 11 C# tutorials I want to submit, should I link to a single page, or submit 11 tutorials with links to the file download? 1 tutorial is in PDF, the other 10 are video tutorials.

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Each must be separate url's pointing to the tutorial, if you submit youtube videos please use the contact page and ask Dan prior to submitting so you can confirm they're your tutorials, reason being every now and again we get submitted tutorials from youtube that belong to other people. Otherwise they must be on the same url as your website you're submitting.

So I link to the page that has all 11 links, as in submit one tutorial just linking to that page?

Its basically 1 large tutorial, just 10 video parts (not youtube, they are WMV files) and a text edition (pdf)

Yep that's fine