How to create a dictionary from a list with duplicate keys?

How to create a dictionary from a list with duplicate keys?

var dict = employees

.GroupBy(e => e.Department)

.ToDictionary(g => g.Key, g => g.ToList());

Follow :

foreach (var kvp in dict)

Console.WriteLine($"{kvp.Key} Department:");

foreach (var emp in kvp.Value)

Console.WriteLine($" - {emp.Name}");

Explanation:

Group employees by department and convert groups to dictionary entries.