Merge branch 'csharp2042'

Author: craiggwilson

src/MongoDB.Driver.Core.Dotnet/MongoDB.Driver.Core.Dotnet.csproj

@@ -27,6 +27,7 @@
     <PackageReference Include="System.Net.NameResolution" Version="4.0.0" />
     <PackageReference Include="System.Net.Security" Version="4.0.0" />
     <PackageReference Include="System.Security.SecureString" Version="4.0.0" />
+    <PackageReference Include="DnsClient" Version="1.0.7" />
   </ItemGroup>
 
 </Project>

src/MongoDB.Driver.Core/Core/Configuration/ClusterBuilderExtensions.cs

@@ -1,4 +1,4 @@
-/* Copyright 2010-2016 MongoDB Inc.
+/* Copyright 2010-2017 MongoDB Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -46,6 +46,7 @@ public static ClusterBuilder ConfigureWithConnectionString(this ClusterBuilder b
             Ensure.IsNotNullOrEmpty(connectionString, nameof(connectionString));
 
             var parsedConnectionString = new ConnectionString(connectionString);
+
             return ConfigureWithConnectionString(builder, parsedConnectionString);
         }
 
@@ -60,6 +61,8 @@ public static ClusterBuilder ConfigureWithConnectionString(this ClusterBuilder b
             Ensure.IsNotNull(builder, nameof(builder));
             Ensure.IsNotNull(connectionString, nameof(connectionString));
 
+            connectionString = connectionString.Resolve();
+
             // TCP
             if (connectionString.ConnectTimeout != null)
             {