convert to C# & update config system

Pilz.Configuration/ISettingsIdentifier.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Pilz.Configuration
+{
+    public interface ISettingsIdentifier
+    {
+        static abstract string Identifier { get; }
+    }
+}