Msbuild: Found conflicts between different versions of the same dependent assembly

[justintoth]

Steps to Reproduce

1. Open our Xamarin Android solution (which I can provide to someone on the Xamarin team through some secure method.)
2. Build the solution.
3. Notice how there are build warnings about different version conflicts, which started in the latest Xamarin release.

Expected Behavior

There are no warnings related to different version conflicts when building the project, as we're using the latest versions of each package.

Actual Behavior

Building gives the following warnings:

/Library/Frameworks/Mono.framework/Versions/5.10.1/lib/mono/msbuild/15.0/bin/Microsoft.Common.CurrentVersion.targets(5,5): Warning MSB3247: Found conflicts between different versions of the same dependent assembly. In Visual Studio, double-click this warning (or select it and press Enter) to fix the conflicts; otherwise, add the following binding redirects to the "runtime" node in the application configuration file: (MSB3247) (com.rpr.mobile.droid)

/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(3,3): Warning MSB3247: Found conflicts between different versions of the same dependent assembly. In Visual Studio, double-click this warning (or select it and press Enter) to fix the conflicts; otherwise, add the following binding redirects to the "runtime" node in the application configuration file: (MSB3247) (com.rpr.mobile.droid)

Version Information

=== Visual Studio Community 2017 for Mac ===

Version 7.4.3 (build 10)
Installation UUID: 62cf1ad2-0db0-41e1-ac78-aeb509d79f60
Runtime:
Mono 5.8.1.0 (2017-10/6bf3922f3fd) (64-bit)
GTK+ 2.24.23 (Raleigh theme)

Package version: 508010000

=== NuGet ===

Version: 4.3.1.4445

=== .NET Core ===

Runtime: /usr/local/share/dotnet/dotnet
Runtime Versions:
2.0.5
2.0.0
1.1.1
1.0.4
SDK: /usr/local/share/dotnet/sdk/2.1.4/Sdks
SDK Versions:
2.1.4
2.0.0
1.0.3
MSBuild SDKs: /Library/Frameworks/Mono.framework/Versions/5.8.1/lib/mono/msbuild/15.0/bin/Sdks

=== Xamarin.Profiler ===

Version: 1.6.1
Location: /Applications/Xamarin Profiler.app/Contents/MacOS/Xamarin Profiler

=== Apple Developer Tools ===

Xcode 9.3 (14154)
Build 9E145

=== Xamarin.Mac ===

Version: 4.2.1.29 (Visual Studio Community)

=== Xamarin.iOS ===

Version: 11.9.1.24 (Visual Studio Community)
Hash: f62de472
Branch: xcode9.3
Build date: 2018-03-29 19:30:53-0400

=== Xamarin.Android ===

Version: 8.2.0.16 (Visual Studio Community)
Android SDK: /android/sdk
Supported Android versions:
5.0 (API level 21)
5.1 (API level 22)
6.0 (API level 23)
7.0 (API level 24)
7.1 (API level 25)
8.0 (API level 26)
8.1 (API level 27)

SDK Tools Version: 26.1.1
SDK Platform Tools Version: 27.0.1
SDK Build Tools Version: 27.0.3

Java SDK: /Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home
java version "1.8.0_101"
Java(TM) SE Runtime Environment (build 1.8.0_101-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.101-b13, mixed mode)

Android Designer EPL code available here:
https://github.com/xamarin/AndroidDesigner.EPL

=== Xamarin Inspector ===

Version: 1.4.0
Hash: b3f92f9
Branch: master
Build date: Fri, 19 Jan 2018 22:00:34 GMT
Client compatibility: 1

=== Build Information ===

Release ID: 704030010
Git revision: 5af3e98549653fcc5335896ccc296343d08f31bb
Build date: 2018-04-12 12:32:07-04
Xamarin addins: fadb82fb0fe2668cb7789f8b524aec6fb8568ee7
Build lane: monodevelop-lion-d15-6

=== Operating System ===

Mac OS X 10.13.4
Darwin 17.5.0 Darwin Kernel Version 17.5.0
Mon Mar 5 22:24:32 PST 2018
root:xnu-4570.51.1~1/RELEASE_X86_64 x86_64

=== Enabled user installed addins ===

Internet of Things (IoT) development (Preview) 7.1

[justintoth]

Repro project:
rpr-mobile-test.zip

[justintoth]

Not surprising since this ticket has been ignored, but this is still an issue in 2019. Today I created a new Xamarin Android project, added some nuget packages, and sure enough I'm still getting the same warnings. Could someone please look into this?

/Library/Frameworks/Mono.framework/Versions/5.16.0/lib/mono/msbuild/15.0/bin/Microsoft.Common.CurrentVersion.targets(5,5): Warning MSB3247: Found conflicts between different versions of the same dependent assembly. In Visual Studio, double-click this warning (or select it and press Enter) to fix the conflicts; otherwise, add the following binding redirects to the "runtime" node in the application configuration file: <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"><dependentAssembly><assemblyIdentity name="System.Runtime" culture="neutral" publicKeyToken="b03f5f7f11d50a3a" /><bindingRedirect oldVersion="0.0.0.0-4.1.0.0" newVersion="4.1.0.0" /></dependentAssembly></assemblyBinding><assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"><dependentAssembly><assemblyIdentity name="System.Threading.Tasks" culture="neutral" publicKeyToken="b03f5f7f11d50a3a" /><bindingRedirect oldVersion="0.0.0.0-2.6.10.0" newVersion="2.6.10.0" /></dependentAssembly></assemblyBinding> (MSB3247) (com.rpr.mobile.droid)
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(3,3): Warning MSB3247: Found conflicts between different versions of the same dependent assembly. In Visual Studio, double-click this warning (or select it and press Enter) to fix the conflicts; otherwise, add the following binding redirects to the "runtime" node in the application configuration file: <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"><dependentAssembly><assemblyIdentity name="System.Runtime" culture="neutral" publicKeyToken="b03f5f7f11d50a3a" /><bindingRedirect oldVersion="0.0.0.0-2.6.10.0" newVersion="2.6.10.0" /></dependentAssembly></assemblyBinding><assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"><dependentAssembly><assemblyIdentity name="System.Threading.Tasks" culture="neutral" publicKeyToken="b03f5f7f11d50a3a" /><bindingRedirect oldVersion="0.0.0.0-2.6.10.0" newVersion="2.6.10.0" /></dependentAssembly></assemblyBinding> (MSB3247) (com.rpr.mobile.droid)

[bmarinov]

I just got the same issue, could anyone really really look into it? We would appreciate it.