Parameter error

BorisopritBorisoprit Member ✭✭✭
edited October 12 in Xamarin.Forms


i have an error .

What does this mean and what to do about it ?


  • mjdevelopermjdeveloper Member ✭✭✭

    put code please!

  • BorisopritBorisoprit Member ✭✭✭

    The problem is that i dont know where to look .

    Does not matter what i open every time the error.

    Open Properties ,then error.

    Build , then error.

    Open Xaml page , then error.

    Or add new page or existing what ever , always the error.

    It is an app that i made and is in test fase in Playstore , when adding something that does not work or is nice then after some test i remove the project and put the original from a external harddrive back.

    Maybe there is the problem coming from ?????

  • JohnHardmanJohnHardman GBUniversity mod


    (1) Have you restarted Visual Studio?
    (2) Have you rebooted your PC?
    (3) If you create a new solution using the "Mobile App (Xamarin.Forms)" template, do you get the same error? If so, you'll probably need to repair your Visual Studio installation.

  • BorisopritBorisoprit Member ✭✭✭

    Restarted both a few time's and when i start a new programm or download example then there is no error .

    Can i do something with Build actions ?

    Using Visual Studio for a few year for making programm's for windows pc, but i am very new with making app's

    Using Visual Studio 2019 version 16.3.2

    New project everything is oke

  • LeonLuLeonLu Member, Xamarin Team Xamurai

    Can you provide a demo that could re-produce this issue? If not, you can create a free case.

  • BorisopritBorisoprit Member ✭✭✭

    Still working on the error and found this now.

    do i have to remove something , build or rebuild is not working anymore

    "obj\Release\90\Ouderijn.Android.dll;obj\Release\90\Ouderijn.Android.dll" is an invalid value for the "OutputAssembly" parameter of the "Csc" task. Multiple items cannot be passed into a parameter of type "Microsoft.Build.Framework.ITaskItem". Ouderijn.Android

  • LeonLuLeonLu Member, Xamarin Team Xamurai

    Thanks for your update, if you solve this issue, please mark you reply as answer, it will help others who have similar issue.

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