diff -r bb8b0b9fa21b -r f442150ff735 Interface/Interface.cs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Interface/Interface.cs	Thu Aug 14 09:12:59 2014 +0200
@@ -0,0 +1,38 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.ServiceModel;
+using System.Collections;
+
+
+namespace SharpDisplayInterface
+{
+
+    [ServiceContract(CallbackContract = typeof(IDisplayServiceCallback))]
+    public interface IDisplayService
+    {
+        [OperationContract(IsOneWay = true)]
+        void Connect(string aClientName);
+
+        [OperationContract(IsOneWay = true)]
+        void SetText(int aLineIndex, string aText);
+
+        [OperationContract(IsOneWay = true)]
+        void SetTexts(System.Collections.Generic.IList<string> aTexts);
+    }
+
+
+    public interface IDisplayServiceCallback
+    {
+        [OperationContract(IsOneWay = true)]
+        void OnConnected();
+
+        [OperationContract(IsOneWay = true)]
+        void OnServerClosing();
+    }
+
+
+
+}