Add netstandard2.0 framework to nuget managed package. (#8960)

* Add netstandard2.0 to nuget managed package.
Re-does PR that was backed out due to packaging pipeline changes.
Allows deprecation of netstandard1.1 in the following release as netstandard2 is the preferred lowest level framework.

.gitignore

@@ -30,6 +30,7 @@ onnxruntime_profile*.json
 /docs/python/inference/examples/*.onnx
 /docs/python/inference/examples/graph.*
 /docs/python/*_LICENSE
+/LICENSE.txt
 /csharp/**/obj/
 /csharp/**/bin/
 /csharp/Directory.Build.props
@@ -37,8 +38,8 @@ docs/python/inference/*.onnx
 *.onnx
 onnxprofile_profile_test_*.json
 /csharp/packages
-/csharp/src/Microsoft.ML.OnnxRuntime/Microsoft.ML.OnnxRuntime.targets
-/csharp/src/Microsoft.ML.OnnxRuntime/Microsoft.ML.OnnxRuntime.props
+/csharp/src/Microsoft.ML.OnnxRuntime/targets/**/*.targets
+/csharp/src/Microsoft.ML.OnnxRuntime/targets/**/*.props
 cmake/external/FeaturizersLibrary/
 # Java specific ignores
 java/gradlew
@@ -53,7 +54,7 @@ onnxruntime/python/version_info.py
 /tools/perf_util/src/main/resources
 /orttraining/orttraining/eager/ort_aten.g.cpp
 /orttraining/orttraining/eager/ort_customops.g.cpp
-
+/csharp/**/packages
 # direnv, posh-direnv
 .envrc
 .psenvrc

csharp/src/Microsoft.ML.OnnxRuntime/Microsoft.ML.OnnxRuntime.csproj

@@ -1,7 +1,7 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netstandard1.1</TargetFramework>
+    <TargetFrameworks>netstandard1.1;netstandard2.0</TargetFrameworks>
     <Platforms>AnyCPU;x86</Platforms>
     <LangVersion>7.2</LangVersion>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
@@ -139,8 +139,8 @@
           Pack="true"
           Visible="false"
     />
-    <None Include="$(PackageId).targets" 
-          PackagePath="\build\$(TargetFramework)"
+    <None Include="targets\netstandard\$(PackageId).targets"
+          PackagePath="build\netstandard1.1\$(PackageId).targets;build\netstandard2.0\$(PackageId).targets"
           Pack="true"
           Visible="false" 
     />
@@ -163,18 +163,18 @@
   </ItemGroup>
 
   <ItemGroup>
-    <LicenseFile Include="$(OnnxRuntimeCsharpRoot)\..\LICENSE" />
-    <TargetsFile Include="$(OnnxRuntimeCsharpRoot)\src\Microsoft.ML.OnnxRuntime\targets.xml" />
+    <LicenseFile Include="$(OnnxRuntimeCsharpRoot)\..\LICENSE" Visible="false" />
+    <TargetsFile Include="$(OnnxRuntimeCsharpRoot)\src\Microsoft.ML.OnnxRuntime\targets\netstandard\targets.xml" Visible="false" />
   </ItemGroup>
 
   <Target Name="CopyMiscFiles" BeforeTargets="Pack">
     <Copy SourceFiles="@(LicenseFile)" DestinationFiles="@(LicenseFile->'$(OnnxRuntimeCsharpRoot)\..\%(Filename).txt')" />
-    <Copy SourceFiles="@(TargetsFile)" DestinationFiles="@(TargetsFile->'$(OnnxRuntimeCsharpRoot)\src\\Microsoft.ML.OnnxRuntime\$(PackageId).targets')" />
+    <Copy SourceFiles="@(TargetsFile)" DestinationFiles="@(TargetsFile->'$(OnnxRuntimeCsharpRoot)\src\Microsoft.ML.OnnxRuntime\targets\netstandard\$(PackageId).targets')" />
   </Target>
 
   <Target Name="CopyPackage" AfterTargets="Pack">
   <Copy
-    SourceFiles="$(OutputPath)..\$(PackageId).$(PackageVersion).nupkg"
+    SourceFiles="$(OutputPath)\$(PackageId).$(PackageVersion).nupkg"
     DestinationFolder="$(NativeBuildOutputDir)\nuget-artifacts"
     />
 </Target>

csharp/src/Microsoft.ML.OnnxRuntime/targets/netstandard/targets.xml

@@ -12,5 +12,4 @@
                       '$(SuppressOnnxRuntimePlatformCompatibilityError)' != 'true'"
            Text="Microsoft.ML.OnnxRuntime only supports the AnyCPU, x64, and x86 platforms at this time."/>
   </Target>
-
 </Project>

tools/ci_build/github/azure-pipelines/c-api-noopenmp-packaging-pipelines.yml

@@ -121,6 +121,7 @@ jobs:
   pool: 'Win-CPU-2021'
   dependsOn:
   - Linux_C_API_Packaging_GPU_x64
+  - Linux_C_API_Packaging_GPU_TensorRT_x64
   - Windows_Packaging_gpu
   - Windows_Packaging_tensorrt
   condition: succeeded()

tools/nuget/generate_nuspec_for_native_nuget.py

@@ -515,20 +515,24 @@ def generate_files(list, args):
 
     if is_cpu_package or is_cuda_gpu_package or is_dml_package or is_mklml_package:
         # Process props file
-        source_props = os.path.join(args.sources_path, 'csharp', 'src', 'Microsoft.ML.OnnxRuntime', 'props.xml')
-        target_props = os.path.join(args.sources_path, 'csharp', 'src', 'Microsoft.ML.OnnxRuntime',
-                                    args.package_name + '.props')
+        source_props = os.path.join(args.sources_path, 'csharp', 'src', 'Microsoft.ML.OnnxRuntime', 'targets',
+                                    'netstandard', 'props.xml')
+        target_props = os.path.join(args.sources_path, 'csharp', 'src', 'Microsoft.ML.OnnxRuntime', 'targets',
+                                    'netstandard', args.package_name + '.props')
         os.system(copy_command + ' ' + source_props + ' ' + target_props)
         files_list.append('<file src=' + '"' + target_props + '" target="build\\native" />')
         files_list.append('<file src=' + '"' + target_props + '" target="build\\netstandard1.1" />')
+        files_list.append('<file src=' + '"' + target_props + '" target="build\\netstandard2.0" />')
 
         # Process targets file
-        source_targets = os.path.join(args.sources_path, 'csharp', 'src', 'Microsoft.ML.OnnxRuntime', 'targets.xml')
-        target_targets = os.path.join(args.sources_path, 'csharp', 'src', 'Microsoft.ML.OnnxRuntime',
-                                      args.package_name + '.targets')
+        source_targets = os.path.join(args.sources_path, 'csharp', 'src', 'Microsoft.ML.OnnxRuntime', 'targets',
+                                      'netstandard', 'targets.xml')
+        target_targets = os.path.join(args.sources_path, 'csharp', 'src', 'Microsoft.ML.OnnxRuntime', 'targets',
+                                      'netstandard', args.package_name + '.targets')
         os.system(copy_command + ' ' + source_targets + ' ' + target_targets)
         files_list.append('<file src=' + '"' + target_targets + '" target="build\\native" />')
         files_list.append('<file src=' + '"' + target_targets + '" target="build\\netstandard1.1" />')
+        files_list.append('<file src=' + '"' + target_targets + '" target="build\\netstandard2.0" />')
 
     # Process License, ThirdPartyNotices, Privacy
     files_list.append('<file src=' + '"' + os.path.join(args.sources_path, 'LICENSE.txt') + '" target="LICENSE.txt" />')