We have a C# application that works with our managed package. Before we switched to a managed package everything worked fine. Since swithcing to a managed package and adding the namespace in the C# code, it is failing on queries of custom objects with 

" INVALID_TYPE: sObject type 'namespace__Client__c' is not supported."

The WSDL has been updated.

What is confusing to us is the query

SELECT namespace__Account_Number__c FROM Accounts

works fine.

What does not work is 

SELECT namespace__Account_Number__c FROM namespace__Client__c

We have a C# application that works with our managed package. Before we switched to a managed package everything worked fine. Since swithcing to a managed package and adding the namespace in the C# code, it is failing on queries of custom objects with 

" INVALID_TYPE: sObject type 'namespace__Client__c' is not supported."

The WSDL has been updated.

What is confusing to us is the query

SELECT namespace__Account_Number__c FROM Accounts

works fine.

What does not work is 

SELECT namespace__Account_Number__c FROM namespace__Client__c