[ADDED] User the shared project + integrated it with the other classes

SharedClientServer/User.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace SharedClientServer
+{
+    class User
+    {
+        private string _username;
+        private int _score;
+
+        public User(string username, int score)
+        {
+            _username = username;
+            _score = score;
+        }
+
+        public string Username
+        {
+            get { return _username; }
+            set { _username = value; }
+        }
+
+        public int Score
+        {
+            get { return _score; }
+            set { _score = value; }
+        }
+    }
+}