Query Search on Date Field

I am having a hard time trying to figure out how to search on a date only field.  How do I create my where clause? 

Where schdate = Convert.ToDateTime(dateParameters[0].InputedValue)

No matter what I pass, I get a lot of different errors saying invalid query syntax.

My execution looks something like this:

var query = new PassthruEsqlQuery(entityType, sql);

ObservableCollection<EntityBase> dataSource = new ObservableCollection<EntityBase>(Globals.EntityManager.ExecuteQuery(query).Cast<EntityBase>().ToList());

You should be able to construct a query string containing the date - it's just that Entity SQL has a very non-intuitive syntax for date fields.  Here's some info from the MSDN - http://msdn.microsoft.com/en-us/library/bb399176.aspx, and here's a link to a similar question here - http://www.ideablade.com/forum/forum_posts.asp?TID=806