convert to C# & update config system

Pilz.Configuration/ISettings.cs

@@ -0,0 +1,11 @@
+using System.Collections.Generic;
+
+namespace Pilz.Configuration
+{
+    public interface ISettings
+    {
+        IReadOnlyCollection<IChildSettings> Childs { get; }
+        T Get<T>() where T : IChildSettings, ISettingsIdentifier;
+        void Reset();
+    }
+}