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Home/ Questions/Q 6764269
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Editorial Team
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Editorial Team
Asked: May 26, 20262026-05-26T14:34:27+00:00 2026-05-26T14:34:27+00:00

On my WinForm, a reference is created: using System.Runtime.InteropServices.ComTypes; When a variable is declared:

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On my WinForm, a reference is created:

using System.Runtime.InteropServices.ComTypes;

When a variable is declared:

private IStream data;

This becomes a reference to the struct Namespace.

It must be fully qualified:

private System.Runtime.InteropServices.ComTypes.IStream data;

What other reference could interfere with this?
I have another project that does not need to fully qualify this reference.

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  1. Editorial Team
    Editorial Team
    2026-05-26T14:34:27+00:00Added an answer on May 26, 2026 at 2:34 pm

    If you don’t fully qualify, do you get an ambiguous reference error? It should tell you what the two options are.. You can also use the refactoring helper — if you do the dropdown to try and resolve it, it’ll tell you where it’s finding the interface..

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