How to resolve .net core build error NETDSDK1061 and warning MSB3277

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I’ve tried to find any help on that issue, finding some GitHub issues (e.g. this one) looking pretty similar, but were actually different.
I’ve found a descriptive doc, but that didn’t really helped me.

I found a pretty helpful blog post from Rick Strahl, explaining what packages are available and what the purpose of each package is. That was a good thing to start.

This is my solution:

Step 1:
Execute Install-Package Microsoft.AspNetCore.App -Version [VersionOfYourChoice] and/or execute Install-Package Microsoft.NETCore.App -Version [VersionOfYourChoice] in package manager console.

Step 2:
Edit .csproj as shown below:

<PropertyGroup>
    <TargetFramework>netcoreapp2.1</TargetFramework>
    <RuntimeFrameworkVersion>2.1.4</RuntimeFrameworkVersion>  <- add this line
    <!--<TargetLatestRuntimePatch>true</TargetLatestRuntimePatch> --> <- alternative
</PropertyGroup>

One more takeaway: If you work with Win10, do yourself a favor and check the installed .NET Core SDK/Runtimes etc. Uninstall every SDK/Runtimes you do not need (again: Check Rick’s blog post for that).
You only need those you are currently targeting in one of your projects.

For example: If you’re working on one .NET Core project, and you just did those 2 steps with Versions 2.1.4 – as time of writing you only need Microsoft .NET Core SDK 2.1.402. To clean up a little, I uninstalled every .NET Core SDK/Runtimes/Packages and just took the latest from here.

Note: I followed this blog post from Jeff Atwood to answer a question, which took me too long to resolve. I hope that helps.

EDIT:
Good news for .NET Core 2.2: You just have to edit the .csproj as follows:

<PropertyGroup>
  <TargetFramework>netcoreapp2.2</TargetFramework>
  <RuntimeFrameworkVersion>2.2.0</RuntimeFrameworkVersion>
</PropertyGroup>

EDIT:
The metapackages should not be updated manually anymore. This is the recommendation for updating AspNetCore. The version of the metapackage depends on the installed SDK.

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