Include information on Generic types

[fiksen99]

If I want to include a reference to a generic type, the format isn't clear. The format should be of the form:
<see cref="IDictionary{T, U}" />

We should document how to format this. Also (I'm unsure if possible), indicate how to reference T and U (in this example) as concrete type (when it is known at compile time what those types are).

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Document Details

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• ID: 7c9f2f59-0dec-c531-b19a-a2109ea0f973
• Version Independent ID: 74c6022c-8661-216e-4f48-e5f08f432f85
• Content: <see> - C# Programming Guide
• Content Source: docs/csharp/programming-guide/xmldoc/see.md
• Product: dotnet-csharp
• Technology: csharp-fundamentals
• GitHub Login: @BillWagner
• Microsoft Alias: wiwagn

[BillWagner]

Thanks for writing this @fiksen99

I've added this to our backlog to address when we next update this article.

[dotnet-bot]

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