title: Can't compile the F# compiler on Windows
body: <p>I want compile F# on Windows</p>
  
  <p>my Windows have installed .NET 4.7.2</p>
  
  <p>I run build.cmd, as <a href="https://github.com/dotnet/fsharp" rel="nofollow noreferrer">https://github.com/dotnet/fsharp</a> said</p>
  
  <p>got error:</p>
  
  <pre><code>Can't find property "PositionalBinding" for class "System.Management.Automation.CmdletBindingAttribute" at 
  C:\code\fsharpfromgithub\fsharp\eng\build.ps1:17 char 15
  + [CmdletBinding &lt;&lt;&lt;&lt; (PositionalBinding=$false)]
  + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
  + FullyQualifiedErrorId : PropertyAssignmentException
  </code></pre>
  
  <p>I create a VM, install only .net core 2.2, but got same error</p>
  
  <p>Is some one got same error? How to fix it, Thanks!</p>