- add @ before server protocol strings

GBase.Api/Communication/ServerProtocol.cs

@@ -20,9 +20,9 @@ namespace GBase.Api.Communication
             switch (protocol)
             {
                 case ServerProtocol.Http:
-                    return "http://";
+                    return @"http://";
                 case ServerProtocol.Https:
-                    return "https://";
+                    return @"https://";
                 case ServerProtocol.Tcp:
                     throw new NotImplementedException();
                 default:
@@ -32,9 +32,9 @@ namespace GBase.Api.Communication
 
         public static ServerProtocol GetServerProtocolFromString(string @string)
         {
-            if (@string.Equals("http://") || @string.Equals("http"))
+            if (@string.Equals(@"http://") || @string.Equals("http"))
                 return ServerProtocol.Http;
-            else if (@string.Equals("https://") || @string.Equals("https"))
+            else if (@string.Equals(@"https://") || @string.Equals("https"))
                 return ServerProtocol.Https;
             else
                 throw new ArgumentOutOfRangeException(nameof(@string), @string, "Invalid string.");