Using Linq, how can I pass a var back from a method?

var myData = from a in db.MyTable
						  where a.MyValue == "A"
						  select new
						  {
							  a.Key,
							  a.MyValue
						  };

public  ???  GetSomeData()
{
   // my Linq query
}

var myData = from a in db.MyTable
             where a.MyValue == "A"
             select new MyType
             {
                 Key = a.Key,
                 Value = a.MyValue
             };

public IQueryable GetSomeData()

public class MyType {Key{get;set;} Value{get;set}}

public IQueryable<T> GetSomeData<T>() where T : MyType, new()
 { return from a in db.MyTable
          where a.MyValue == "A"
          select new T {Key=a.Key,Value=a.MyValue};
 }