How does LINQ defer execution when in a using statement

Question

Imagine I have the following:

private IEnumerable MyFunc(parameter a)
{
   using(MyDataContext dc = new MyDataContext)
   {
      return dc.tablename.Select(row          


        

Answer 1

I just posted another deferred-execution solution to this problem here, including this sample code:

IQueryable MyFunc(string myValue)
{
    return from dc in new MyDataContext().Use()
           from row in dc.MyTable
           where row.MyField == myValue
           select row;
}

void UsingFunc()
{
    var result = MyFunc("MyValue").OrderBy(row => row.SortOrder);
    foreach(var row in result)
    {
        //Do something
    }
}

The Use() extension method essentially acts like a deferred using block.