Question

I have a method that is defined to receive two parameters. One is a generic type, the other is a function with a generic return type:

public class MyHelperClass<TRequest, TResponse>
{
   public TResponse Execute(TRequest request, Func<IDataRecord, TResponse> builder){ ... }
}

Then I have an object that has a method I want to pass in as a delegate

public class MyObject
{
   public TResponse BuildMe(IDataRecord rdr){ ... }
}

//call like this
MyHelperClass.Execute(input, myObjectInstance.BuildMe);

but I get an error stating:

“Expected a method with ‘TRequest BuildResponse(IDataRecord)’

why is it expecting a TRequest as a return instead of a TResponse??

Answer 1

Because this:

private GetSamyungDataSourceV1<TRequest, TRequest> _getSamyungDataSourceV1;

.. should be:

private GetSamyungDataSourceV1<TRequest, TResponse> _getSamyungDataSourceV1;
                                          // ^^^ this.

..otherwise, TResponse in that class is a TRequest.