Merged feature/business-system into develop

Server/Extensions/IntegerExtension.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace reallife_gamemode.Server.Extensions
+{
+    public static class IntegerExtension
+    {
+        public static string ToMoneyString(this int? money)
+        {
+            return ToMoneyString(money ?? 0);
+        }
+        public static string ToMoneyString(this int money)
+        {
+            return string.Format(Main.SERVER_CULTURE, "{0:C0}", money).Replace('€', '$');
+        }
+    }
+}