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Asked: 2026-05-11T15:05:16+00:00

My project references an assembly (will call it X) that references another assembly (will

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My project references an assembly (will call it X) that references another assembly (will call it Y).

When I try to compile my project, it demands that it should reference assembly Y. Why is that? I get the following error on the line where assembly X is referenced:

The type ‘DevExpress.XtraEditors.XtraForm’ is defined in an assembly that is not referenced. You must add a reference to assembly ‘DevExpress.Utils.v9.1, Version=9.1.2.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a’.

DevExpress.XtraEditors.XtraForm is the assembly Y.

Why is this? I have not seen this behavior before.

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1 Answer

  1. This has always been in place. You will only get these at compile time if you’re using an object that gets methods/properties/members etc from assembly Y.

    The why is because .NET cannot rely on assembly X to ensure it will be able to obtain proper symbol and meta data information.

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