Microsoft.Build.Evaluation.Project Constructor throws an exception when dotnet sdk 5.0.100 is installed.

[gewarren]

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Issue moved from dotnet/dotnet-api-docs#5143

• Please respond to @WenyunZou.

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From @WenyunZou on Wednesday, November 25, 2020 9:13:21 AM

Hi,

Api at https://docs.microsoft.com/en-us/dotnet/api/microsoft.build.evaluation.project.-ctor?view=msbuild-16-netcore

If I'm opening the issued at a wrong place, please help me to redirect it. Thank you!

Description:
It had been working fine until I installed dotnet sdk 5.0.100 recently. The constructor of Microsoft.Build.Evaluation.Project throws an exception "MSBuild.CouldNotLoadSdkResolver".
Code:
Project project = new Project(projectFilePath);
Exception:
The SDK resolver type "WorkloadSdkResolver" failed to load. Could not load file or assembly 'System.Runtime, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.
StackTrace:

   at Microsoft.Build.Shared.ProjectFileErrorUtilities.VerifyThrowInvalidProjectFile(Boolean condition, String errorSubCategoryResourceName, BuildEventFileInfo projectFile, Exception innerException, String resourceName, Object[] args)
   at Microsoft.Build.Shared.ProjectFileErrorUtilities.ThrowInvalidProjectFile(BuildEventFileInfo projectFile, Exception innerException, String resourceName, Object[] args)
   at Microsoft.Build.BackEnd.SdkResolution.SdkResolverLoader.LoadResolvers(String resolverPath, LoggingContext loggingContext, ElementLocation location, List`1 resolvers)
   at Microsoft.Build.BackEnd.SdkResolution.SdkResolverLoader.LoadResolvers(LoggingContext loggingContext, ElementLocation location)
   at Microsoft.Build.BackEnd.SdkResolution.SdkResolverService.Initialize(LoggingContext loggingContext, ElementLocation location)
   at Microsoft.Build.BackEnd.SdkResolution.SdkResolverService.ResolveSdk(Int32 submissionId, SdkReference sdk, LoggingContext loggingContext, ElementLocation sdkReferenceLocation, String solutionPath, String projectPath, Boolean interactive, Boolean isRunningInVisualStudio)
   at Microsoft.Build.BackEnd.SdkResolution.CachingSdkResolverService.<>n__0(Int32 submissionId, SdkReference sdk, LoggingContext loggingContext, ElementLocation sdkReferenceLocation, String solutionPath, String projectPath, Boolean interactive, Boolean isRunningInVisualStudio)
   at Microsoft.Build.BackEnd.SdkResolution.CachingSdkResolverService.<>c__DisplayClass3_0.<ResolveSdk>b__1()
   at System.Lazy`1.ViaFactory(LazyThreadSafetyMode mode)
   at System.Lazy`1.ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor)
   at System.Lazy`1.CreateValue()
   at System.Lazy`1.get_Value()
   at Microsoft.Build.BackEnd.SdkResolution.CachingSdkResolverService.ResolveSdk(Int32 submissionId, SdkReference sdk, LoggingContext loggingContext, ElementLocation sdkReferenceLocation, String solutionPath, String projectPath, Boolean interactive, Boolean isRunningInVisualStudio)
   at Microsoft.Build.Evaluation.Evaluator`4.ExpandAndLoadImportsFromUnescapedImportExpressionConditioned(String directoryOfImportingFile, ProjectImportElement importElement, List`1& projects, SdkResult& sdkResult, Boolean throwOnFileNotExistsError)
   at Microsoft.Build.Evaluation.Evaluator`4.ExpandAndLoadImports(String directoryOfImportingFile, ProjectImportElement importElement, SdkResult& sdkResult)
   at Microsoft.Build.Evaluation.Evaluator`4.EvaluateImportElement(String directoryOfImportingFile, ProjectImportElement importElement)
   at Microsoft.Build.Evaluation.Evaluator`4.PerformDepthFirstPass(ProjectRootElement currentProjectOrImport)
   at Microsoft.Build.Evaluation.Evaluator`4.Evaluate()
   at Microsoft.Build.Evaluation.Evaluator`4.Evaluate(IEvaluatorData`4 data, ProjectRootElement root, ProjectLoadSettings loadSettings, Int32 maxNodeCount, PropertyDictionary`1 environmentProperties, ILoggingService loggingService, IItemFactory`2 itemFactory, IToolsetProvider toolsetProvider, ProjectRootElementCacheBase projectRootElementCache, BuildEventContext buildEventContext, ISdkResolverService sdkResolverService, Int32 submissionId, EvaluationContext evaluationContext, Boolean interactive)
   at Microsoft.Build.Evaluation.Project.ProjectImpl.Reevaluate(ILoggingService loggingServiceForEvaluation, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext)
   at Microsoft.Build.Evaluation.Project.ProjectImpl.ReevaluateIfNecessary(ILoggingService loggingServiceForEvaluation, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext)
   at Microsoft.Build.Evaluation.Project.ProjectImpl.ReevaluateIfNecessary(ILoggingService loggingServiceForEvaluation, EvaluationContext evaluationContext)
   at Microsoft.Build.Evaluation.Project.ProjectImpl.ReevaluateIfNecessary(EvaluationContext evaluationContext)
   at Microsoft.Build.Evaluation.Project.ProjectImpl.Initialize(IDictionary`2 globalProperties, String toolsVersion, String subToolsetVersion, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext)
   at Microsoft.Build.Evaluation.Project..ctor(String projectFile, IDictionary`2 globalProperties, String toolsVersion, String subToolsetVersion, ProjectCollection projectCollection, ProjectLoadSettings loadSettings, EvaluationContext evaluationContext)
   at Microsoft.Build.Evaluation.Project..ctor(String projectFile, IDictionary`2 globalProperties, String toolsVersion, String subToolsetVersion, ProjectCollection projectCollection, ProjectLoadSettings loadSettings)
   at Microsoft.Build.Evaluation.Project..ctor(String projectFile, IDictionary`2 globalProperties, String toolsVersion, ProjectCollection projectCollection, ProjectLoadSettings loadSettings)
   at Microsoft.Build.Evaluation.Project..ctor(String projectFile, IDictionary`2 globalProperties, String toolsVersion, ProjectCollection projectCollection)
   at Microsoft.Build.Evaluation.Project..ctor(String projectFile, IDictionary`2 globalProperties, String toolsVersion)
   at Microsoft.Build.Evaluation.Project..ctor(String projectFile)
   at XXXXXXXXXXXXXXXXXXXX

Repro Steps:

1. create a c# project
2. Add nuget package: Microsoft.Build(16.3.0) & Microsoft.Build.Locator(1.2.6)
3. type the following code into Program.cs file:

using Microsoft.Build.Evaluation;
using Microsoft.Build.Locator;
using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            MSBuildLocator.RegisterDefaults();
            string path = ResolveOutputAssemblyPath(@"a path to any valid .csproj file");
            Console.WriteLine(path);

            Console.ReadKey();
            return;
        }

        private static string ResolveOutputAssemblyPath(string projectFilePath, string buildConfiguration = "Debug")
        {
            Project project = new Project(projectFilePath);
            string assemblyPath = project.GetPropertyValue("TargetPath");
            project.ProjectCollection.UnloadProject(project);
            project.ProjectCollection.UnloadProject(project.Xml);
            if (string.IsNullOrEmpty(assemblyPath))
            {
                throw new Exception($"Failed to resolve target assembly of project {projectFilePath}.");
            }

            return assemblyPath;
        }
    }
}

1. type F5 to run

[gewarren]

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Issue moved from dotnet/dotnet-api-docs#5143

• Please respond to @Dotnet-GitSync-Bot.

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From @Dotnet-GitSync-Bot on Wednesday, November 25, 2020 9:13:43 AM

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[gewarren]

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Issue moved from dotnet/dotnet-api-docs#5143

• Please respond to @gewarren.

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From @gewarren on Tuesday, January 12, 2021 7:14:52 PM

cc @ghogen @rainersigwald. Should I move this issue here? https://github.com/dotnet/msbuild/issues

[gewarren]

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Issue moved from dotnet/dotnet-api-docs#5143

• Please respond to @ghogen.

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From @ghogen on Tuesday, January 12, 2021 7:17:42 PM

@gewarren @rainersigwald Agreed - looks like a product bug report that should be moved to the MSBuild repo.

[rainersigwald]

@WenyunZou what version of .NET Core is your application targeting? This sounds like a 3.1 application trying to load a 5.0 SDK.

[WenyunZou]

Hi, It is <TargetFrameworks>netcoreapp2.1;netcoreapp3.0</TargetFrameworks> I used the below to solve my problem. MSBuildLocator.RegisterMSBuildPath(msbuildPath);

[rainersigwald]

Are you using the most recent version of MSBuildLocator? microsoft/MSBuildLocator#106 has a fix for this specific issue.

[Forgind]

I'm assuming updating MSBuildLocator resolved the problem? If not, let me know, and I can reopen this.