WCF charset=utf-8 of the response message does not match the content type of the binding (application/soap+xml; charset=utf-8)

Question

I\'m hosting a WCF service in IIS 7.5 using .NET 4.0. I also have a WPF application that I am using as my client that was built with Visual Studio 2010 and .NET 4.0. I add

Answer 1

in my case same error was caused by missing

[datacontract] 
[datamember]

attributes in returned data type.

Error message was really misleading.