Skip import of Microsoft.NuGet.props and Microsoft.NuGet.targets

src/Tasks/Microsoft.NET.Build.Tasks/build/Microsoft.NET.Sdk.props

@@ -85,6 +85,10 @@ Copyright (c) .NET Foundation. All rights reserved.
 
     <!-- This will turn off the base UWP-specific 'ResolveNuGetPackages' target -->
     <ResolveNuGetPackages>false</ResolveNuGetPackages>
+
+    <!-- Skip import of Microsoft.NuGet.props and Microsoft.NuGet.targets -->
+    <SkipImportNuGetProps>true</SkipImportNuGetProps>
+    <SkipImportNuGetBuildTargets>true</SkipImportNuGetBuildTargets>
 
     <!-- NuGet should always restore .NET SDK projects with "PackageReference" style restore.  Setting this property will
          cause the right thing to happen even if there aren't any PackageReference items in the project, such as when

test/Microsoft.NET.Build.Tests/GivenThatWeWantToBuildANetCoreApp.cs

@@ -76,5 +76,36 @@ public void It_targets_the_right_shared_framework(string targetFramework, string
             var netCoreAppLibrary = target.Libraries.Single(l => l.Name == "Microsoft.NETCore.App");
             netCoreAppLibrary.Version.ToString().Should().Be(expectedPackageVersion);
         }
+
+        [Fact]
+        public void It_restores_only_ridless_tfm()
+        {
+            //  Disable this test when using full Framework MSBuild, until MSBuild is updated 
+            //  to provide conditions in NuGet ImportBefore/ImportAfter props/targets
+            //  https://github.com/dotnet/sdk/issues/874
+            if (UsingFullFrameworkMSBuild)
+            {
+                return;
+            }
+
+            var testAsset = _testAssetsManager
+                .CopyTestAsset("HelloWorld")
+                .WithSource()
+                .Restore();
+
+            var getValuesCommand = new GetValuesCommand(Stage0MSBuild, testAsset.TestRoot,
+                "netcoreapp1.0", "TargetDefinitions", GetValuesCommand.ValueType.Item);
+
+            getValuesCommand
+                .Execute()
+                .Should()
+                .Pass();
+
+            // When RuntimeIdentifier is not specified, the assets file
+            // should only contain one target with no RIDs
+            var targetDefs = getValuesCommand.GetValues();
+            targetDefs.Count.Should().Be(1);
+            targetDefs.Should().Contain(".NETCoreApp,Version=v1.0");
+        }
     }
 }