Fody mscorlib not found on .NETStandard project

[gercobrandwijk]

Hello,

I am using Fody with AsyncErrorHandler.Fody and PropertyChanged.Fody in a PCL project which targets .NETStandard1.1.

When building I get the error that Fody cannot find mscorlib. Here the full stack trace:
1>FodyTarget: 1> Fody: Fody (version 1.29.4.0) Executing 1> Fody: ProjectDirectory: 'C:\Projects\ProjectLocation\Portable\ProjectName\'. 1> Fody: AssemblyPath: 'C:\Projects\ProjectLocation\Portable\ProjectName\obj\Debug\ProjectName.dll' 1> Fody: Found path to weavers file 'C:\Projects\ProjectLocation\Portable\ProjectName\FodyWeavers.xml'. 1> Fody: SolutionDirectory path is 'C:\Projects\ProjectLocation\' 1> Fody: Finding weavers 1> Fody: Adding weaver dlls from 'C:\Projects\ProjectLocation\Packages'. 1> Fody: Could not find packages dir from nuget config. 1> Fody: SolutionDirectoryPath: C:\Projects\ProjectLocation\ 1> Fody: Adding weaver dlls from 'C:\Users\username\.nuget\packages\Fody'. 1> Fody: SolutionDirectoryPath: C:\Projects\ProjectLocation\ 1> Fody: Skipped scanning 'C:\Projects\ProjectLocation\Tools' for weavers since it doesn't exist. 1> Fody: Fody weaver file added 'C:\Users\username\.nuget\packages\AsyncErrorHandler.Fody\1.0.11\AsyncErrorHandler.Fody.dll' 1> Fody: Fody weaver file added 'C:\Users\username\.nuget\packages\PropertyChanged.Fody\1.52.1\PropertyChanged.Fody.dll' 1> Fody: No Weaver project file found. 1> Fody: Finished finding weavers 5ms 1> Fody: Reference count=57 1> Fody: Found debug symbols at 'C:\Projects\ProjectLocation\Portable\ProjectName\obj\Debug\ProjectName.pdb'. 1> Fody: Weaver 'C:\Users\username\.nuget\packages\PropertyChanged.Fody\1.52.1\PropertyChanged.Fody.dll'. 1> Fody: Initializing weaver 1> Fody: Loading 'C:\Users\username\.nuget\packages\PropertyChanged.Fody\1.52.1\PropertyChanged.Fody.dll' from cache. 1> Fody: Weaver 'C:\Users\username\.nuget\packages\AsyncErrorHandler.Fody\1.0.11\AsyncErrorHandler.Fody.dll'. 1> Fody: Initializing weaver 1> Fody: Loading 'C:\Users\username\.nuget\packages\AsyncErrorHandler.Fody\1.0.11\AsyncErrorHandler.Fody.dll' from cache. 1> Fody/PropertyChanged: Executing Weaver 1> Fody/PropertyChanged: Can not find 'mscorlib, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'. 1> Tried: 1> C:\Users\username\.nuget\packages\Acr.UserDialogs\6.3.2\lib\portable-win+net45+wp8+win8+wpa81\Acr.UserDialogs.dll 1> C:\Users\username\.nuget\packages\Acr.UserDialogs\6.3.2\lib\portable-win+net45+wp8+win8+wpa81\Acr.UserDialogs.Interface.dll 1> C:\Users\username\.nuget\packages\akavache.core\5.0.0\lib\Portable-Net45+Win8+WP8+Wpa81\Akavache.dll 1> C:\Users\username\.nuget\packages\Akavache.SQLite3\5.0.0\lib\Portable-Net45+Win8+WP8+Wpa81\Akavache.Sqlite3.dll 1> C:\Users\username\.nuget\packages\Autofac\4.2.1\lib\netstandard1.1\Autofac.dll 1> C:\Users\username\.nuget\packages\fusillade\0.7.0\lib\Portable-net45+win+wpa81+wp80\Fusillade.dll 1> C:\Users\username\.nuget\packages\Microsoft.CSharp\4.0.1\ref\netstandard1.0\Microsoft.CSharp.dll 1> C:\Users\username\.nuget\packages\modernhttpclient\2.4.2\lib\Portable-Net45+WinRT45+WP8+WPA81\ModernHttpClient.dll 1> C:\Users\username\.nuget\packages\Newtonsoft.Json\9.0.1\lib\netstandard1.0\Newtonsoft.Json.dll 1> C:\Users\username\.nuget\packages\Polly\4.3.0\lib\portable-net45+netcore45+wpa81+wp8\Polly.dll 1> C:\Users\username\.nuget\packages\Punchclock\1.1.1\lib\Portable-net45+win+wpa81+wp80\Punchclock.dll 1> C:\Users\username\.nuget\packages\refit\3.0.1\lib\netstandard1.1\Refit.dll 1> C:\Users\username\.nuget\packages\Rx-Core\2.2.5\lib\portable-net45+winrt45+wp8+wpa81\System.Reactive.Core.dll 1> C:\Users\username\.nuget\packages\Rx-Interfaces\2.2.5\lib\portable-net45+winrt45+wp8+wpa81\System.Reactive.Interfaces.dll 1> C:\Users\username\.nuget\packages\Rx-Linq\2.2.5\lib\portable-net45+winrt45+wp8+wpa81\System.Reactive.Linq.dll 1> C:\Users\username\.nuget\packages\Rx-PlatformServices\2.2.5\lib\portable-net45+winrt45+wp8+wpa81\System.Reactive.PlatformServices.dll 1> C:\Users\username\.nuget\packages\Splat\1.6.2\lib\Portable-net45+win+wpa81+wp80\Splat.dll 1> C:\Users\username\.nuget\packages\SQLitePCLRaw.bundle_e_sqlite3\1.1.0\lib\netstandard1.1\SQLitePCLRaw.batteries_e_sqlite3.dll 1> C:\Users\username\.nuget\packages\SQLitePCLRaw.bundle_e_sqlite3\1.1.0\lib\netstandard1.1\SQLitePCLRaw.batteries_v2.dll 1> C:\Users\username\.nuget\packages\SQLitePCLRaw.core\1.1.0\lib\netstandard1.1\SQLitePCLRaw.core.dll 1> C:\Users\username\.nuget\packages\System.Collections.Concurrent\4.0.12\ref\netstandard1.1\System.Collections.Concurrent.dll 1> C:\Users\username\.nuget\packages\System.Collections\4.0.11\ref\netstandard1.0\System.Collections.dll 1> C:\Users\username\.nuget\packages\System.ComponentModel\4.0.1\ref\netstandard1.0\System.ComponentModel.dll 1> C:\Users\username\.nuget\packages\System.Diagnostics.Debug\4.0.11\ref\netstandard1.0\System.Diagnostics.Debug.dll 1> C:\Users\username\.nuget\packages\System.Diagnostics.Tools\4.0.1\ref\netstandard1.0\System.Diagnostics.Tools.dll 1> C:\Users\username\.nuget\packages\System.Diagnostics.Tracing\4.1.0\ref\netstandard1.1\System.Diagnostics.Tracing.dll 1> C:\Users\username\.nuget\packages\System.Dynamic.Runtime\4.0.11\ref\netstandard1.0\System.Dynamic.Runtime.dll 1> C:\Users\username\.nuget\packages\System.Globalization\4.0.11\ref\netstandard1.0\System.Globalization.dll 1> C:\Users\username\.nuget\packages\System.IO.Compression\4.1.0\ref\netstandard1.1\System.IO.Compression.dll 1> C:\Users\username\.nuget\packages\System.IO\4.1.0\ref\netstandard1.0\System.IO.dll 1> C:\Users\username\.nuget\packages\System.Linq.Expressions\4.1.0\ref\netstandard1.0\System.Linq.Expressions.dll 1> C:\Users\username\.nuget\packages\System.Linq\4.1.0\ref\netstandard1.0\System.Linq.dll 1> C:\Users\username\.nuget\packages\System.Net.Http\4.1.0\ref\netstandard1.1\System.Net.Http.dll 1> C:\Users\username\.nuget\packages\System.Net.Primitives\4.0.11\ref\netstandard1.1\System.Net.Primitives.dll 1> C:\Users\username\.nuget\packages\System.ObjectModel\4.0.12\ref\netstandard1.0\System.ObjectModel.dll 1> C:\Users\username\.nuget\packages\System.Reflection.Extensions\4.0.1\ref\netstandard1.0\System.Reflection.Extensions.dll 1> C:\Users\username\.nuget\packages\System.Reflection.Primitives\4.0.1\ref\netstandard1.0\System.Reflection.Primitives.dll 1> C:\Users\username\.nuget\packages\System.Reflection\4.1.0\ref\netstandard1.0\System.Reflection.dll 1> C:\Users\username\.nuget\packages\System.Resources.ResourceManager\4.0.1\ref\netstandard1.0\System.Resources.ResourceManager.dll 1> C:\Users\username\.nuget\packages\System.Runtime.Extensions\4.1.0\ref\netstandard1.0\System.Runtime.Extensions.dll 1> C:\Users\username\.nuget\packages\System.Runtime.InteropServices.RuntimeInformation\4.0.0\ref\netstandard1.1\System.Runtime.InteropServices.RuntimeInformation.dll 1> C:\Users\username\.nuget\packages\System.Runtime.InteropServices\4.1.0\ref\netstandard1.1\System.Runtime.InteropServices.dll 1> C:\Users\username\.nuget\packages\System.Runtime.Numerics\4.0.1\ref\netstandard1.1\System.Runtime.Numerics.dll 1> C:\Users\username\.nuget\packages\System.Runtime.Serialization.Primitives\4.1.1\ref\netstandard1.0\System.Runtime.Serialization.Primitives.dll 1> C:\Users\username\.nuget\packages\System.Runtime\4.1.0\ref\netstandard1.0\System.Runtime.dll 1> C:\Users\username\.nuget\packages\System.Text.Encoding.Extensions\4.0.11\ref\netstandard1.0\System.Text.Encoding.Extensions.dll 1> C:\Users\username\.nuget\packages\System.Text.Encoding\4.0.11\ref\netstandard1.0\System.Text.Encoding.dll 1> C:\Users\username\.nuget\packages\System.Text.RegularExpressions\4.1.0\ref\netstandard1.0\System.Text.RegularExpressions.dll 1> C:\Users\username\.nuget\packages\System.Threading.Tasks\4.0.11\ref\netstandard1.0\System.Threading.Tasks.dll 1> C:\Users\username\.nuget\packages\System.Threading\4.0.11\ref\netstandard1.0\System.Threading.dll 1> C:\Users\username\.nuget\packages\System.Xml.ReaderWriter\4.0.11\ref\netstandard1.0\System.Xml.ReaderWriter.dll 1> C:\Users\username\.nuget\packages\System.Xml.XDocument\4.0.11\ref\netstandard1.0\System.Xml.XDocument.dll 1> C:\Users\username\.nuget\packages\Xam.Plugin.Connectivity\2.2.12\lib\portable-net45+wp80+wp81+wpa81+win8+MonoAndroid10+MonoTouch10+Xamarin.iOS10+Xamarin.Mac20+UAP10\Plugin.Connectivity.Abstractions.dll 1> C:\Users\username\.nuget\packages\Xam.Plugin.Connectivity\2.2.12\lib\portable-net45+wp80+wp81+wpa81+win8+MonoAndroid10+MonoTouch10+Xamarin.iOS10+Xamarin.Mac20+UAP10\Plugin.Connectivity.dll 1> C:\Users\username\.nuget\packages\Xamarin.Forms\2.3.3.168\lib\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+Xamarin.iOS10+xamarinmac20\Xamarin.Forms.Core.dll 1> C:\Users\username\.nuget\packages\Xamarin.Forms\2.3.3.168\lib\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+Xamarin.iOS10+xamarinmac20\Xamarin.Forms.Platform.dll 1> C:\Users\username\.nuget\packages\Xamarin.Forms\2.3.3.168\lib\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+Xamarin.iOS10+xamarinmac20\Xamarin.Forms.Xaml.dll 1>MSBUILD : error : Fody: An unhandled exception occurred: 1>MSBUILD : error : Exception: 1>MSBUILD : error : Object reference not set to an instance of an object. 1>MSBUILD : error : StackTrace: 1>MSBUILD : error : at ModuleWeaver.FindCoreReferences() in C:\projects\propertychanged\PropertyChanged.Fody\MsCoreReferenceFinder.cs:line 0 1>MSBUILD : error : at ModuleWeaver.Execute() in C:\projects\propertychanged\PropertyChanged.Fody\ModuleWeaver.cs:line 26 1>MSBUILD : error : at lambda_method(Closure , Object ) 1>MSBUILD : error : at InnerWeaver.ExecuteWeavers() in C:\projects\fody\FodyIsolated\InnerWeaver.cs:line 161 1>MSBUILD : error : at InnerWeaver.Execute() in C:\projects\fody\FodyIsolated\InnerWeaver.cs:line 82 1>MSBUILD : error : Source: 1>MSBUILD : error : PropertyChanged.Fody 1>MSBUILD : error : TargetSite: 1>MSBUILD : error : Void FindCoreReferences() 1>MSBUILD : error : 1> Fody: Finished Fody 10ms.

What do I have to do to get Fody working in a .NETStandard project?

[SimonCropp]

currently fody does not support NETStandard

[gercobrandwijk]

When can I expect this? Do you perhaps know of a good alternative for the PropertyChanged.Fody that works with .NETStandard?

[kamil-mrzyglod]

@gercobrandwijk I guess PostSharp would be a viable option for now, not sure whether this particular functionality is available in the free version of it.

[gercobrandwijk]

I checked it, and it is available in the free version, but only up to 10 classes...

Did you already investigate what needs to be done to get it working on .NETStandard? Can I help you with converting it?

[gercobrandwijk]

Already a few other people noted this:
Fody/PropertyChanged#205
Fody/PropertyChanged#185

[irsali]

Fody/PropertyChanged is working with .NetStandard1.5. but i cannot find way to use MethodDecorator.

I am using below in project.json
"frameworks": {
"netstandard1.5": {
"imports": "dnxcore50"
}
}

[SimonCropp]

Fody now supports netstandard. However changes are required in each downstream weaver to make them compat. I will be doing these tasks over the next week. Please ping me if there are any u would like prioritised

[sebandraos]

Thanks a lot for the work on this @SimonCropp , hugely useful and greatly appreciated. Personally PropertyChanged would be useful but I am but one of many many users. FYI it works apart from an "Object reference not set to an instance of an object" exception in MSCoreReferenceFinder.

[SimonCropp]

yep PropertyChanged is high on my list for netstandard compat