how can I filter a collection by smaller time increments?

Given a collection that looks like this: [ {Price:123.45, DateTime:01/01/18 12:01:10} {Price:89.23, DateTime:01/01/18 12:01:20} {Price:66.13, DateTime:01/01/18 12:01:30} {Price:75.00, DateTime:01/01/18 12:02:45} ] How can I filter this collection with linq to only include the first data item which exists closest to the start of each minute? So for example, I want to transform the collection above […]