Example
class Developer
{
public int Id { get; set; }
public string Name { get; set; }
}
class Project
{
public int DeveloperId { get; set; }
public string Name { get; set; }
}
var developers = new[] {
new Developer {
Id = 1,
Name = "Foobuzz"
},
new Developer {
Id = 2,
Name = "Barfizz"
}
};
var projects = new[] {
new Project {
DeveloperId = 1,
Name = "Hello World 3D"
},
new Project {
DeveloperId = 1,
Name = "Super Fizzbuzz Maker"
},
new Project {
DeveloperId = 2,
Name = "Citizen Kane - The action game"
},
new Project {
DeveloperId = 2,
Name = "Pro Pong 2016"
}
};
var grouped = developers.GroupJoin(
inner: projects,
outerKeySelector: dev => dev.Id,
innerKeySelector: proj => proj.DeveloperId,
resultSelector:
(dev, projs) => new {
DeveloperName = dev.Name,
ProjectNames = projs.Select(p => p.Name).ToArray()});
foreach(var item in grouped)
{
Console.WriteLine(
"{0}'s projects: {1}",
item.DeveloperName,
string.Join(", ", item.ProjectNames));
}
//Foobuzz's projects: Hello World 3D, Super Fizzbuzz Maker
//Barfizz's projects: Citizen Kane - The action game, Pro Pong 2016
