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c#.netwindows-hello

How to add Windows Hello in C# .NET 8 WinForms

I need to add Windows Hello to my C# .NET 8 WinForms project. I found a solution here for .Net Framework, but I am using .NET 8. When I try this solution anyways, I get the following error:

NETSDK1135: SupportedOSPlatformVersion 10.0.26100.0 cannot be higher than TargetPlatformVersion 7.0.

I installed the latest version of this package as per the solution linked above, and notice the version number:

enter image description here

Adding:

<PropertyGroup>
    <TargetPlatformVersion>10.0.26100.0</TargetPlatformVersion>
    <SupportedOSPlatformVersion>7.0</SupportedOSPlatformVersion>

to the .csproj file just results in more errors:

enter image description here

As suggested in the link in the error, when I add:

<TargetFramework>net8.0-windows10.0.26100.0</TargetFramework>

I get the error:

10.0.26100.0 is not a valid TargetPlatformVersion for Windows. Valid versions include:
10.0.22621.0
10.0.22000.0
10.0.20348.0
10.0.19041.0
10.0.18362.0
10.0.17763.0
10.0.22000.0
10.0.20348.0
10.0.19041.0
10.0.18362.0
10.0.17763.0
8.0
7.0

I tried playing around with different numbers, but I am still having trouble getting it to work.

I installed the 10.0.26100.0 SDK here.

Solution

  • I found the solution here. The problem is that Visual Studio has not been updated to include 10.0.26100.1. You can add it manually by adding this to the .csproj file:

    <ItemGroup>
    <WindowsSdkSupportedTargetPlatformVersion Include="10.0.26100.1" WindowsSdkPackageVersion="10.0.26100.1" MinimumNETVersion="6.0" />
    <SdkSupportedTargetPlatformVersion Include="10.0.26100.1" />
</ItemGroup>

    Here is what my .csproj file looks like now:

    <Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>WinExe</OutputType>
    <TargetFramework>net8.0-windows</TargetFramework>
    <Nullable>enable</Nullable>
    <UseWindowsForms>true</UseWindowsForms>
    <ImplicitUsings>enable</ImplicitUsings>
    <TargetFramework>net8.0-windows10.0.26100.1</TargetFramework>
    <TargetPlatformVersion>10.0.22621.1</TargetPlatformVersion>
  </PropertyGroup>

  <ItemGroup>
    <WindowsSdkSupportedTargetPlatformVersion Include="10.0.26100.1" WindowsSdkPackageVersion="10.0.26100.1" MinimumNETVersion="6.0" />
        <SdkSupportedTargetPlatformVersion Include="10.0.26100.1" />
  </ItemGroup>

</Project>

    I also had to uninstall the NuGet packages. Also, make sure to clean your solution in Build > Clean Solution and Build > Clean [project name]

    I am guessing Visual Studio will fix this in a future update.