title: post .net core 3 sdk install errors
body: <p>On Win10, i had .net core 2.2 installed with vs code running fine (using the c# extension). I installed the latest visual studio, thinking it would also install .net core 3, but it didnt, so i downloaded and installed the sdk from: </p>
  
  <p><a href="https://dotnet.microsoft.com/download/thank-you/dotnet-sdk-3.0.100-windows-x64-installer" rel="nofollow noreferrer">https://dotnet.microsoft.com/download/thank-you/dotnet-sdk-3.0.100-windows-x64-installer</a></p>
  
  <p>Since then when i create a new project (say dotnet new console) I get multiple errors without doing anything: </p>
  
  <p><a href="https://i.stack.imgur.com/MOzWS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/MOzWS.png" alt="enter image description here"></a></p>
  
  <p>running <strong>dotnet --version</strong> returns:</p>
  
  <pre><code>dotnet --version
  3.0.100
  </code></pre>
  
  <p><strong>classes.csproj</strong> shows:</p>
  
  <pre><code>&lt;Project Sdk="Microsoft.NET.Sdk"&gt;
    &lt;PropertyGroup&gt;
      &lt;OutputType&gt;Exe&lt;/OutputType&gt;
      &lt;TargetFramework&gt;netcoreapp3.0&lt;/TargetFramework&gt;
    &lt;/PropertyGroup&gt;
  &lt;/Project&gt;
  </code></pre>
  
  <p>running: <strong>dotnet build</strong>  </p>
  
  <pre><code>Microsoft (R) Build Engine version 16.3.0+0f4c62fea for .NET Core
  Copyright (C) Microsoft Corporation. All rights reserved.
  
    Restore completed in 65.55 ms for E:\training\Csharpe\classes\classes.csproj.
    classes -&gt; E:\training\Csharpe\classes\bin\Debug\netcoreapp3.0\classes.dll
  
      0 Error(s)
  
  Time Elapsed 00:00:00.95
  </code></pre>
  
  <p><strong>dotnet restore</strong> returns:</p>
  
  <pre><code>  Restore completed in 18.49 ms for E:\training\Csharpe\classes\classes.csproj.
  </code></pre>
  
  <p>if i create a 2.1 app in visual studio i get no issues, so its just v3???</p>