Is it possible to run netcore 3.x application under the net5

Question

I have a clean Windows 10 x64 virtual machine with dotnet 5.0.2 SDK installed

I created the new project using 'dotnet new console' I edited the .csproj file changing net5 target to netcoreapp3.1 I called 'dotnet build' - its ok I called 'dotnet run' - its failed

The output is: It was not possible to find any compatible framework version The framework 'Microsoft.NETCore.App', version '3.1.0' was not found. - The following frameworks were found: 5.0.2 at [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]

You can resolve the problem by installing the specified framework and/or SDK.

Does the net5 is back compatible with netcoreapp3 ?

Answer 1

You cannot run a .NET 3.1 app on the .NET 5 runtime. A 3.1 app requires that you install the runtime for .NET 3.1 as well. Major version changes indicate a new runtime (e.g. .NET Core 2 requires the .NET Core 2.x runtime, .NET Core 3 requires the .NET Core 3.x runtime).

Note that you can write code for an app that runs on both .NET 3.1 and .NET 5 but they are compiled separately, produce separate binaries and dependencies and the appropriate version would need to be deployed onto the target machine based upon the runtime that is installed.

Answer 2

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