How to use Group By with Join and Min in Linq?
The GroupBy operator is a versatile tool for identifying groups of data based on any type's conformance to the IEqualityComparer interface. The Min, Max, First, and Last methods are similarly flexible, allowing you to identify conditions across any type conforming to the IIterable interface. This general application of the GroupBy and Min operators makes it a great tool for finding patterns in your data set
groupby in linq
on Jan 01, 1970
//Method Syntax
List<Result> results2 = persons
.GroupBy(p => p.PersonId,
(k, c) => new Result()
{
PersonId = k,
Cars = c.Select(cs => cs.car).ToList()
}
).ToList();
0
linq group by
on Jan 01, 1970
var results = persons.GroupBy(
p => p.PersonId,
p => p.car,
(key, g) => new { PersonId = key, Cars = g.ToList() });0
This is the most robust way to handle what you are looking for. It doesn't matter if your collection is large or small, it's fast and efficient.
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