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I noticed that I cannot use using-alias-directives with the Evaluator I got from the Mono.CSharp 18.104.22.168 NuGet package.
In the example below, the third 'evaluator.Run' expression will throw, but only if I've declared a using-alias-directive before it.
public class Program
public static void Main()
var evaluator = new Evaluator(
evaluator.Run("using MyConsole = System.Console;");
evaluator.Run("Console.WriteLine(\"Hello World\")"); // Throws
Not sure if this bug report belongs in the correct section or not.
Fixed in master