DC fails after version upgrade

Issue:

We've been using DocConverter 8.1.0.19067 and recently upgraded to 10.1.1.19334 
We use the following piece of code to convert document through an internal web service. 
Instantiate oDC........ 
oDc.OpenRemoteConnection("localhost", "62625)"; 
var result = oDc.ConvertToPDF(inputFilename, outputFilename);

This works fine in 8 but returns the following error in 10.

{"message":"No HTTP resource was found that matches the request URI 'http://localhost:62625/api/DocConverter/ConvertToPDF?json=1'.","messageDetail":"No action was found on the controller 'DocConverter' that matches the request."} 
DocConverter.RunConvertFileRequest

Resolution:

The Current application is still referencing the old APDocConverter.Net45.dll. Referenced APDocConverter.Net46.dll and recompiled with success.