Prism: In vs2019，target framework is null

[topfunet]

When i use VS2019, i created a prism wpf project, but target framework is null and i can't build project.

[kyledavi5]

Hello @topfunet,

Please consider updating your submission to include more detailed information about the issue you're experiencing. In order to assist the prism project leads we've been provided the following template / guidelines for us to utilize when creating new issues for them to review. :)

Description

Steps to Reproduce

1. 
   
   
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Expected Behavior

Actual Behavior

Basic Information

• Version with issue:
• Last known good version:
• Xamarin.Forms version:
• IDE:

Screenshots

Reproduction Link

[wrhighfield]

Having the same issue, the info requested.

Description
When creating a new Prism Blank App (WPF) in Visual Studio 2019 the Target Framework cannot be determined by the compiler and building the project fails

Steps to Reproduce

1. Create a new project based on the Prism Blank App (WPF) using .NET Framework 4.7.2
2. Select Unity as the IOC Container
3. Try and compile the project

Expected Behavior
Project should compile

Actual Behavior
Project fails to compile

Basic Information

1. Compiler throws the error: Your project does not reference ".NETFramework,Version=4.7.2" framework. Add a reference to ".NETFramework,Version=4.7.2" in the "TargetFrameworks" property of your project file and then re-run NuGet restore.
2. Unloading the csproj file and editing it raises an error about Inconsistent Line Endings
3. The PackageReference for Prism (at bottom) seems to have a NewLine feed in the Version attribute
4. Adding an App.Config file and setting the supportedRuntime to be v4.0 and sku .NETFramework,Version=v4.7.2 also fails to fix the issue (the project fails to recognize the configuration section properly)
5. The project file xml does have the correct target framework as an element
6. Unable to set the Target Framework in the project settings screen (does not reload the project when you select 4.7.2)
7. To fix the issue you can select a different .NET Framework version (project reloads) and then select 4.7.2 (project now reloads) and can be compiled.
8. Creating a standard Blank WPF app does not have this issue.

Version with issue:
Latest in Prism Template

Last known good version:
N/A

Xamarin.Forms version:

IDE:
Visual Studio 2019 Final Release (tested with Community)

Screenshots

Reproduction Link

[brianlagunas]

Something changed in how the versions are read from the template parameters.

The work around is to unload the project, edit the project file, and add a "v" in front of the TargetFrameworkVersion so that it look like:

<TargetFrameworkVersion>v4.7.2</TargetFrameworkVersion>

[brianlagunas]

This has been fixed and will be available on the marketplace shortly

[lock[bot]]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.