Refactor to api connections. Update Checker.

PWAPPv2/Source/Config/Configuration.cs

@@ -0,0 +1,54 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml;
+using System.IO;
+
+namespace PWAPPv2.Source.Config
+{
+    public class Configuration
+    {
+        private Dictionary<string, string> values;
+
+        public Configuration(string file) 
+        {
+            values = new Dictionary<string, string>();
+            if(!File.Exists(file))
+            {
+                throw new ConfigFileNotFoundException();
+            }
+
+            string f = File.ReadAllText(file);
+
+            XmlDocument xmlDoc = new XmlDocument();
+            xmlDoc.LoadXml(f);
+
+            XmlNodeList xmlNodeList = xmlDoc.DocumentElement.ChildNodes;
+            foreach (XmlNode xmlNode in xmlNodeList)
+            {
+                values.Add(xmlNode.Name, xmlNode.InnerText);
+            }
+
+        }
+
+        public string Get(string key)
+        {
+            try
+            {
+                return values[key];
+            }
+            catch
+            {
+                throw new ConfigValueNotFoundException();
+            }
+        }
+        
+
+    }
+
+    public class ConfigFileNotFoundException : Exception { }
+
+    public class ConfigValueNotFoundException: Exception { }
+}