Casting Object/Dynamic to Anonymous Type

Question

I have an EF query which returns an anonymous type of several joined tables. I pass this to another function as a dynamic. Is there any way to cast the dynamic to an anonymous type of known anonymous type? If there is a way to do this, I would assume that passing it as an Object is better than a dynamic, is this correct?

...
var appts = (from a in dbc.tblAppt join b in dbc.tblApptTypes on a.Type equals b.Type select new {a, b}).ToList();
If (appts.Any())
    ProcessAppts(appts);
}

void ProcessAppts(dynamic appts)
{
    var AnonTypeAppts = appts as (new {tblAppt, tblApptTypes}); // This bit here
}

Answer 1

No. Anonymous types are... anonymous. You can't cast a variable to an anonymous type, like you tried in your code. And preferably you shouldn't pass them around though other methods. They should be kept inside. And you really shouldn't use dynamic for this.

I suggest to create a 'real' type which you can pass around to another method.