Can’t get AWS Elastic Beanstalk Command Line Tool to work on Windows 8. Get the following PowerShell error?

Add-Type : Cannot add type due to the following exception: Compiler executable
file csc.exe cannot be found.. Verify that version 3.5 of the Microsoft .NET
Framework is installed. On 64-bit versions of Windows, the WOW64 component is
also required.
At C:UsersAlbertDocumentsWindowsPowerShellModulesAWSDevToolsAWSDevTools.
ps1:315 char:1
+ Add-Type -Language CSharpVersion3 -TypeDefinition $awsSource
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Add-Type], InvalidOperationEx
ception
+ FullyQualifiedErrorId : System.InvalidOperationException,Microsoft.Power
Shell.Commands.AddTypeCommand