Unknown solution item type: {42C0BBD9-55CE-4FC1-8D90-A7348ABAFB23}
c#, macos, mono, monodevelop, monomac
Solution
The solution was to remove the following line from the `.csproj` altogether:
<ProjectTypeGuids>{42C0BBD9-55CE-4FC1-8D90-A7348ABAFB23};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
The project can then be loaded normally in Monodevelop.
Problem
I am trying to open a project in Monodevelop (3.0.5, with MonoMac add-in enabled) on Mac Mavericks. I get this error: ``` MonoDevelop.Projects.Formats.MSBuild.UnknownSolutionItemTypeException: Unknown solution item type: {42C0BBD9-55CE-4FC1-8D90-A7348ABAFB23};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC} at MonoDevelop.Projects.Formats.MSBuild.MSBuildProjectHandler.CreateSolutionItem (IProgressMonitor monitor, MonoDevelop.Projects.Formats.MSBuild.MSBuildProject p, System.String fileName, System.String language, System.String typeGuids, System.String itemType, System.Type itemClass) [0x00143] in /Users/builder/data/lanes/monodevelop-lion-monodevelop-3.0-series/e159cf08/source/monodevelop/main/src/core/MonoDevelop.Core/MonoDevelop.Projects.Formats.MSBuild/MSBuildProjectHandler.cs:369 ``` The most relevant part is probably this one: Unknown solution item type: {42C0BBD9-55CE-4FC1-8D90-A7348ABAFB23};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC} These UUIDs can be found in the `<ProjectTypeGuids>` of the `.csproj` file I try to open. - `FAE04EC0-301F-11D3-BF4B-00C04F79EFBC` is the UUID for C# projects, - `42C0BBD9-55CE-4FC1-8D90-A7348ABAFB23` is the UUID for MonoMac projects. I can open other C# projects normally, so I guess this is a problem with Monomac? Monodevelop has the MonoMac add-in enabled. I tried to compile MonoMac from source but the DLL it generates can't be loaded as an add-in (`ZipException`).