I have successfully integrated both Human_Resources and Financial_Management using asp.net C#. So I'm putting all together all the issues I had experienced and helpful resources I found online:
WorkDay Documentation is available at: https://community.workday.com/sites/default/files/file-hosting/productionapi/index.html
To get started, read here http://hr.dovetailsoftware.com/gcox/2014/06/13/getting-started-workday-web-services-using-c/ make sure to follow some cleanup tips on this article.
If you get the same error while submitting data to WD
Error
There was an error in serializing one of the headers in message Get_ProjectsInput: ‘Unable to generate a temporary class (result=1).
error CS0030: Cannot convert type ‘ConsoleApplication1.WkDay.Rm.Asset_Book_Rule_Request_CriteriaType’ to ‘ConsoleApplication1.WkDay.Rm.Asset_Book_Rule_Request_ReferencesType’
error CS0030: Cannot convert type ‘ConsoleApplication1.WkDay.Rm.Asset_Shares_Request_CriteriaType’ to ‘ConsoleApplication1.WkDay.Rm.Asset_Shares_Request_ReferenceType’
error CS0029: Cannot implicitly convert type ‘ConsoleApplication1.WkDay.Rm.Asset_Book_Rule_Request_ReferencesType’ to ‘ConsoleApplication1.WkDay.Rm.Asset_Book_Rule_Request_CriteriaType’
error CS0029: Cannot implicitly convert type ‘ConsoleApplication1.WkDay.Rm.Asset_Shares_Request_ReferenceType’ to ‘ConsoleApplication1.WkDay.Rm.Asset_Shares_Request_CriteriaType’
‘. Please see InnerException for more details.