Make this readonly to keep SQL CLR happy, references #57

Author: michaelklishin

projects/client/RabbitMQ.Client/src/client/api/ConnectionFactory.cs

@@ -46,7 +46,9 @@
 using System.Threading.Tasks;
 
 #if !NETFX_CORE
+
 using System.Net.Security;
+
 #endif
 
 namespace RabbitMQ.Client
@@ -141,7 +143,7 @@ public class ConnectionFactory : ConnectionFactoryBase, IConnectionFactory
         /// <summary>
         ///  Default SASL auth mechanisms to use.
         /// </summary>
-        public static AuthMechanismFactory[] DefaultAuthMechanisms = { new PlainMechanismFactory() };
+        public static readonly AuthMechanismFactory[] DefaultAuthMechanisms = { new PlainMechanismFactory() };
 
         /// <summary>
         ///  SASL auth mechanisms to use.
@@ -400,4 +402,4 @@ private string UriDecode(string uri)
             return System.Uri.UnescapeDataString(uri.Replace("+", "%2B"));
         }
     }
-}
+}