When using new-style csproj with .NET Framework, the default TargetPlatform is x86 rather than AnyCPU

[davidmatson]

Visual Studio Version:
2019 (16.2.0)

Summary:
When using the new-style (CPS?) csproj but targeting .NET Framework, the default TargetPlatform is differe than either .NET Core or old-style .NET Framework csprojs (x86 rather than AnyCPU).

Steps to Reproduce:

1. File -> New -> Project -> .NET Core exe

2. Unload the csproj and replace the target framework line with: <TargetFramework>net472</TargetFramework>

3. Releoad the project and check its properties

Expected Behavior:
Target platform in AnyCPU.

Actual Behavior:
Target platform is x86.

User Impact:
Confusing behavior when restoring NuGet packages, and inconsistency with all other C# project variants.

[davkean]

tag @nguerrera

[chenghuang-mdsol]

need to add
<PlatformTarget>AnyCPU</PlatformTarget>
to <PropertyGroup /> as a workaround

[vdrasutis]

Faced same issue - solved by adding those elements in the "common.sdk.targets" file:

<Project>
  <PropertyGroup Condition="'$(TargetFramework)' == '' And $(TargetFrameworks) == '' ">
    <TargetFramework>net472</TargetFramework>
  </PropertyGroup>

  <PropertyGroup Condition="'$(TargetFramework)' == 'net472' And '$(TargetFrameworks)' == '' And '$(PlatformTarget)' == ''">
    <PlatformTarget>AnyCPU</PlatformTarget>
  </PropertyGroup>
  ...
</Project>

which is imported in every SDK style project like this
<Import Project="$(SourceRoot)\common.sdk.targets" />