Roll up data from a column into 1 comma delineated cell in SQL?

Question

If I have a table like this:

Name  | Start Time
item1 | 4:00PM
item1 | 6:00PM
item2 | 3:00PM

How can I roll up the start time column so the end result would be

Name  | Start Time
item1 | 4:00PM,6:00PM
item2 | 3:00PM

Thanks!