Hello,
Will you please provide further details of the dairy payment register application that you want to develop?
Being a C# developer (for more than 5 years), so far I've worked on a couple of similar data-based desktop applications using different .net technologies including WPF, Crystal Reports, and others. As it seems that you also want to develop a similar application, I would like to go through the details of the project and see if I can help you with the same.
Please reply to this proposal, if you find it useful.
Regards.