VB compiler supports/erases nullable references in crefs.

[CyrusNajmabadi]

VB allows you to write:

    ''' <summary>
    ''' <see cref="Integer?"/>
    ''' </summary>

but emits

<see cref="T:System.Int32"/>

for that.

Note: C# warns in this case as something invalid. If you want to reference a nullable type at the top level, you need to write it as <see cref="Nullable{SomeTName}"/>

[CyrusNajmabadi]

I feel like this is either a VB compiler (or potentially language) issue.

[sharwell]

If you want to reference a nullable type at the top level

It is not possible to reference a constructed nullable type at the top level (there is no corresponding syntax to generate for the documentation file). dotnet/csharplang#401 is a request to add support for this.

[CyrusNajmabadi]

It is not possible to reference a constructed nullable type at the top level

Sure. I'm just saying that even just referencing Nullable{T} itself needs to be done in the above way.