Always have error “The ObjectContent 1 type failed to serialize the response body…”

Question

I use Web api to retrieve data from the database. I only have 1 table \"tblMessage\" and want to get data from that table.

I set everything up but then when I run th

Answer 1

Change IEnumerable> to List

public IEnumerable GetAllMsg()
{
    return repo.GetAll();
}

to

public List GetAllMsg()
{
    return repo.GetAll();
}

UPDATE: But beware of getting OutOfMemoryException because this method will store all Message objects in local memory so you have to implement some kind of paging.