Error CS0246 The type or namespace name 'Android' could not be found (are you missing a using directive or an assembly reference?)

Question

Please have a look at the packages I have in my Xamarin.Forms project.

Suddenly, without any changes, I started to get the shown error. I got similar issue one time and fixed by updating the packages. But right now, all the packages are up-to-date.

Answer 1

Like Rauf I had to correct the reference of the dll file. To do that, go to .csproj and find a line that says

<Reference Include="Mono.Android">
  <HintPath>..\..\..\..\..\..\..\Program Files (x86)\Microsoft Visual Studio\2019\Professional\Common7\IDE\ReferenceAssemblies\Microsoft\Framework\MonoAndroid\v10.0\Mono.Android.dll</HintPath>

For me at least, it was pointing to old VS2019 folder so I had to just edit the path

Answer 2

..\..\..\..\..\..\..\..\Program Files\Microsoft Visual Studio\2022\Community\Common7\IDE\ReferenceAssemblies\Microsoft\Framework\MonoAndroid\v12.0\Mono.Android.dll

Change the part "HintPath" or check it is the correct path I have this Property in my .csproj file, so I changed this path for the version of Visual Studio 2022, I brought my app from Visual Studio 2019, this is the reason why it did not work

Answer 3

I found that if you look in the .csproj file for Mono.Android.dll you will fine a path with multiple ../../ in the path. I do not k now why this type of path is used but for me it really messed up everything. This is an issue every time you change where the project/solution resides.

Answer 4

I have re-added reference for Mono.Android.dll from the location C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\ReferenceAssemblies\Microsoft\Framework\MonoAndroid\v11.0.

When I moved the location of the project, I guess the reference was broken.