Start by creating objects and adding them to a list. You can use the collection initializer in this case.
var mealList = new List
{
new Meals { Start = dtmealStart1, End = dtmealStart1 },
/* Repeat for the rest of them possibly incorporating some kind of loop to generate this list */
};
//and then get your sorted list
var sortedMealList = mealList.OrderBy(m => m.Start);