Xamarin project opens up with error: Could not load file or assembly 'System.Collections.Immutable'












0














I'm working in a github cloned Xamarin project. When I open up the project it displays the following error:



Severity    Code    Description Project File    Line    Suppression State
Error Could not load file or assembly 'System.Collections.Immutable,
Version=1.2.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of
its dependencies. The located assembly's manifest definition does not match
the assembly reference. (Exception from HRESULT: 0x80131040) ProjectName
C:UsersUSER.nugetpackagesrefit4.6.30buildnetstandard1.4refit.targets
29


I've tried cleaning the project, deleting the bin/obj folders and I've cleared my nuget packages and restored. All of these solutions didn't work and when trying to rebuild the project it displays another error:



Severity    Code    Description Project File    Line    Suppression State
Error The "ResolveLibraryProjectImports" task failed unexpectedly.
System.IO.FileNotFoundException: Could not load assembly 'ProjectName,
Version=0.0.0.0, Culture=neutral, PublicKeyToken='. Perhaps it doesn't exist
in the Mono for Android profile?
File name: 'ProjectName.dll'
at

Java.Interop.Tools.Cecil.DirectoryAssemblyResolver.Resolve(AssemblyNameReference reference, ReaderParameters parameters)
at Java.Interop.Tools.Cecil.DirectoryAssemblyResolver.Resolve(String fullName)
at Xamarin.Android.Tasks.ResolveLibraryProjectImports.Extract(DirectoryAssemblyResolver res, ICollection`1 jars, ICollection`1 resolvedResourceDirectories, ICollection`1 resolvedAssetDirectories, ICollection`1 resolvedEnvironments)
at Xamarin.Android.Tasks.ResolveLibraryProjectImports.Execute()
at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
at Microsoft.Build.BackEnd.TaskBuilder.
<ExecuteInstantiatedTask>d__26.MoveNext() ProjectName.Android


I'm using Visual Studio Community 2017 version 15.8.8 and Xamarin.Forms
2.5.0.280555



The project that I'm working on works on other pc's from co-workers so I think it has to do with my VS installation. I tried to reinstall VS but this resulted in the same errors.










share|improve this question






















  • Update the version of xamarin.forms to 3.x.
    – Lucas Zhang - MSFT
    Nov 13 at 1:00










  • This is not possible since it's a project that other people use and the company doesn't want to upgrade Xamarin to a newer version.
    – Shadow
    Nov 13 at 9:48










  • Set the version of netstandard as 2.0or 2.1.And can you provide the link of the project?
    – Lucas Zhang - MSFT
    Nov 14 at 7:04










  • I'm not allowed to do this since it's a project from the company that I'm working as an intern at
    – Shadow
    Nov 15 at 8:11










  • The .NET standard is already at 2.0 and I don't have the option to switch to 2.1
    – Shadow
    Nov 15 at 8:38
















0














I'm working in a github cloned Xamarin project. When I open up the project it displays the following error:



Severity    Code    Description Project File    Line    Suppression State
Error Could not load file or assembly 'System.Collections.Immutable,
Version=1.2.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of
its dependencies. The located assembly's manifest definition does not match
the assembly reference. (Exception from HRESULT: 0x80131040) ProjectName
C:UsersUSER.nugetpackagesrefit4.6.30buildnetstandard1.4refit.targets
29


I've tried cleaning the project, deleting the bin/obj folders and I've cleared my nuget packages and restored. All of these solutions didn't work and when trying to rebuild the project it displays another error:



Severity    Code    Description Project File    Line    Suppression State
Error The "ResolveLibraryProjectImports" task failed unexpectedly.
System.IO.FileNotFoundException: Could not load assembly 'ProjectName,
Version=0.0.0.0, Culture=neutral, PublicKeyToken='. Perhaps it doesn't exist
in the Mono for Android profile?
File name: 'ProjectName.dll'
at

Java.Interop.Tools.Cecil.DirectoryAssemblyResolver.Resolve(AssemblyNameReference reference, ReaderParameters parameters)
at Java.Interop.Tools.Cecil.DirectoryAssemblyResolver.Resolve(String fullName)
at Xamarin.Android.Tasks.ResolveLibraryProjectImports.Extract(DirectoryAssemblyResolver res, ICollection`1 jars, ICollection`1 resolvedResourceDirectories, ICollection`1 resolvedAssetDirectories, ICollection`1 resolvedEnvironments)
at Xamarin.Android.Tasks.ResolveLibraryProjectImports.Execute()
at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
at Microsoft.Build.BackEnd.TaskBuilder.
<ExecuteInstantiatedTask>d__26.MoveNext() ProjectName.Android


I'm using Visual Studio Community 2017 version 15.8.8 and Xamarin.Forms
2.5.0.280555



The project that I'm working on works on other pc's from co-workers so I think it has to do with my VS installation. I tried to reinstall VS but this resulted in the same errors.










share|improve this question






















  • Update the version of xamarin.forms to 3.x.
    – Lucas Zhang - MSFT
    Nov 13 at 1:00










  • This is not possible since it's a project that other people use and the company doesn't want to upgrade Xamarin to a newer version.
    – Shadow
    Nov 13 at 9:48










  • Set the version of netstandard as 2.0or 2.1.And can you provide the link of the project?
    – Lucas Zhang - MSFT
    Nov 14 at 7:04










  • I'm not allowed to do this since it's a project from the company that I'm working as an intern at
    – Shadow
    Nov 15 at 8:11










  • The .NET standard is already at 2.0 and I don't have the option to switch to 2.1
    – Shadow
    Nov 15 at 8:38














0












0








0







I'm working in a github cloned Xamarin project. When I open up the project it displays the following error:



Severity    Code    Description Project File    Line    Suppression State
Error Could not load file or assembly 'System.Collections.Immutable,
Version=1.2.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of
its dependencies. The located assembly's manifest definition does not match
the assembly reference. (Exception from HRESULT: 0x80131040) ProjectName
C:UsersUSER.nugetpackagesrefit4.6.30buildnetstandard1.4refit.targets
29


I've tried cleaning the project, deleting the bin/obj folders and I've cleared my nuget packages and restored. All of these solutions didn't work and when trying to rebuild the project it displays another error:



Severity    Code    Description Project File    Line    Suppression State
Error The "ResolveLibraryProjectImports" task failed unexpectedly.
System.IO.FileNotFoundException: Could not load assembly 'ProjectName,
Version=0.0.0.0, Culture=neutral, PublicKeyToken='. Perhaps it doesn't exist
in the Mono for Android profile?
File name: 'ProjectName.dll'
at

Java.Interop.Tools.Cecil.DirectoryAssemblyResolver.Resolve(AssemblyNameReference reference, ReaderParameters parameters)
at Java.Interop.Tools.Cecil.DirectoryAssemblyResolver.Resolve(String fullName)
at Xamarin.Android.Tasks.ResolveLibraryProjectImports.Extract(DirectoryAssemblyResolver res, ICollection`1 jars, ICollection`1 resolvedResourceDirectories, ICollection`1 resolvedAssetDirectories, ICollection`1 resolvedEnvironments)
at Xamarin.Android.Tasks.ResolveLibraryProjectImports.Execute()
at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
at Microsoft.Build.BackEnd.TaskBuilder.
<ExecuteInstantiatedTask>d__26.MoveNext() ProjectName.Android


I'm using Visual Studio Community 2017 version 15.8.8 and Xamarin.Forms
2.5.0.280555



The project that I'm working on works on other pc's from co-workers so I think it has to do with my VS installation. I tried to reinstall VS but this resulted in the same errors.










share|improve this question













I'm working in a github cloned Xamarin project. When I open up the project it displays the following error:



Severity    Code    Description Project File    Line    Suppression State
Error Could not load file or assembly 'System.Collections.Immutable,
Version=1.2.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of
its dependencies. The located assembly's manifest definition does not match
the assembly reference. (Exception from HRESULT: 0x80131040) ProjectName
C:UsersUSER.nugetpackagesrefit4.6.30buildnetstandard1.4refit.targets
29


I've tried cleaning the project, deleting the bin/obj folders and I've cleared my nuget packages and restored. All of these solutions didn't work and when trying to rebuild the project it displays another error:



Severity    Code    Description Project File    Line    Suppression State
Error The "ResolveLibraryProjectImports" task failed unexpectedly.
System.IO.FileNotFoundException: Could not load assembly 'ProjectName,
Version=0.0.0.0, Culture=neutral, PublicKeyToken='. Perhaps it doesn't exist
in the Mono for Android profile?
File name: 'ProjectName.dll'
at

Java.Interop.Tools.Cecil.DirectoryAssemblyResolver.Resolve(AssemblyNameReference reference, ReaderParameters parameters)
at Java.Interop.Tools.Cecil.DirectoryAssemblyResolver.Resolve(String fullName)
at Xamarin.Android.Tasks.ResolveLibraryProjectImports.Extract(DirectoryAssemblyResolver res, ICollection`1 jars, ICollection`1 resolvedResourceDirectories, ICollection`1 resolvedAssetDirectories, ICollection`1 resolvedEnvironments)
at Xamarin.Android.Tasks.ResolveLibraryProjectImports.Execute()
at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
at Microsoft.Build.BackEnd.TaskBuilder.
<ExecuteInstantiatedTask>d__26.MoveNext() ProjectName.Android


I'm using Visual Studio Community 2017 version 15.8.8 and Xamarin.Forms
2.5.0.280555



The project that I'm working on works on other pc's from co-workers so I think it has to do with my VS installation. I tried to reinstall VS but this resulted in the same errors.







c# android xamarin xamarin.forms xamarin.android






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Nov 12 at 17:43









Shadow

11




11












  • Update the version of xamarin.forms to 3.x.
    – Lucas Zhang - MSFT
    Nov 13 at 1:00










  • This is not possible since it's a project that other people use and the company doesn't want to upgrade Xamarin to a newer version.
    – Shadow
    Nov 13 at 9:48










  • Set the version of netstandard as 2.0or 2.1.And can you provide the link of the project?
    – Lucas Zhang - MSFT
    Nov 14 at 7:04










  • I'm not allowed to do this since it's a project from the company that I'm working as an intern at
    – Shadow
    Nov 15 at 8:11










  • The .NET standard is already at 2.0 and I don't have the option to switch to 2.1
    – Shadow
    Nov 15 at 8:38


















  • Update the version of xamarin.forms to 3.x.
    – Lucas Zhang - MSFT
    Nov 13 at 1:00










  • This is not possible since it's a project that other people use and the company doesn't want to upgrade Xamarin to a newer version.
    – Shadow
    Nov 13 at 9:48










  • Set the version of netstandard as 2.0or 2.1.And can you provide the link of the project?
    – Lucas Zhang - MSFT
    Nov 14 at 7:04










  • I'm not allowed to do this since it's a project from the company that I'm working as an intern at
    – Shadow
    Nov 15 at 8:11










  • The .NET standard is already at 2.0 and I don't have the option to switch to 2.1
    – Shadow
    Nov 15 at 8:38
















Update the version of xamarin.forms to 3.x.
– Lucas Zhang - MSFT
Nov 13 at 1:00




Update the version of xamarin.forms to 3.x.
– Lucas Zhang - MSFT
Nov 13 at 1:00












This is not possible since it's a project that other people use and the company doesn't want to upgrade Xamarin to a newer version.
– Shadow
Nov 13 at 9:48




This is not possible since it's a project that other people use and the company doesn't want to upgrade Xamarin to a newer version.
– Shadow
Nov 13 at 9:48












Set the version of netstandard as 2.0or 2.1.And can you provide the link of the project?
– Lucas Zhang - MSFT
Nov 14 at 7:04




Set the version of netstandard as 2.0or 2.1.And can you provide the link of the project?
– Lucas Zhang - MSFT
Nov 14 at 7:04












I'm not allowed to do this since it's a project from the company that I'm working as an intern at
– Shadow
Nov 15 at 8:11




I'm not allowed to do this since it's a project from the company that I'm working as an intern at
– Shadow
Nov 15 at 8:11












The .NET standard is already at 2.0 and I don't have the option to switch to 2.1
– Shadow
Nov 15 at 8:38




The .NET standard is already at 2.0 and I don't have the option to switch to 2.1
– Shadow
Nov 15 at 8:38

















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