C# windows client app hanging while calling SP web Service

Question

Hello there,

 

My application users are intermittently facing application hanging issue.

 

In our analysis, we found that this is happening while calling SharePoint 2010 web service from C# Windows form application.

 

Details of the Application and Issue:

 

1. Application is developed on .NET 3.5, C# windows Forms

2. Application try to communicate with SharePoint for downloading and uploading the documents into SharePoint libraries.

3. Some of the SharePoint libraries have already crossed the list threshold, and i think this should be a problem.

4. Considering the issue from Network point of view, we have run the Network analyzer(Wireshark) on user machine, but no luck.

5. Looks like Application is waiting for the response from the SharePoint web service, and it never gives any response and application getting stuck here. 

 

Please provide your valuable suggestion for my problem  

 

Thank you in advance

Vikram