When working with COM interop libraries you may receive the compile error "Interop type cannot be embedded. Use the applicable interface instead". This article describes two common causes of this error and how to resolve it.

Richard Moss

Sep 07, 2019

A sample project which shows how to extract email addresses from Outlook via C# and Interop.

Richard Moss

Sep 26, 2012

Working around exception "Retrieving the COM class factory for component with CLSID {783CD4E4-9D54-11CF-B8EE-00608CC9A71F} failed due to the following error: 80040154." when trying to connect to SourceSafe via interop.

Richard Moss

Jan 19, 2010