- add missingArgumentException

GBase.Server/Exceptions/MissingArgumentException.cs

@@ -0,0 +1,19 @@
+// Author: Simon Gockner
+// Created: 2020-02-08
+// Copyright(c) 2020 SimonG. All Rights Reserved.
+
+using System;
+
+namespace GBase.Server.Exceptions
+{
+    public class MissingArgumentException : Exception
+    {
+        public MissingArgumentException(string argumentPrefix)
+            : base($"Missing Argument for prefix {argumentPrefix}.")
+        {
+            ArgumentPrefix = argumentPrefix;
+        }
+
+        public string ArgumentPrefix { get; }
+    }
+}