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Asked: 2026-05-10T23:51:05+00:00

While working on an existing project I suddenly got the following error when trying

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While working on an existing project I suddenly got the following error when trying to compile the solution:

error MSB3105: The item ‘[filename]’ was specified more than once in the ‘Resources’ parameter. Duplicate items are not supported by the ‘Resources’ parameter.

Now, as far as I’m aware, I did not make any change to the project that affects the resources. Also I have checked each and every file within the project, but there is no duplicate reference anywhere to this file. Now I already found some forum entries regarding this error:

1) Open the .csproj file and remove the duplicate reference. [Tried this, but I cannot find any duplicates in it]

2) In a ‘partial class’ project, move everything to a single class. [ Could try this, but the project has been split up into partial classes since the start, and I do not want to change this just because of the error ]

So what else could cause this ?

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1 Answer

  1. Did you try showing all files in the Solution Explorer? You could have a duplicate .rsx file somewhere in there.

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