Using Linq

Question

I have these two collections, Source and Target. Isnt there a Linq construct that I can use where I am not having to traverse over the second collection Target or that I can just find the value in the Target Collection. Thanks !!

public void DoNotify(UserDefinedFields input)
	{
		var Source = input.GetType().GetProperties();
		var Target = this.GetType().GetProperties();
		foreach (var sourceProp in Source)
		{
			foreach (var targetProp in Target)
			{
				if (sourceProp.Name == targetProp.Name)
				{
					targetProp.SetValue(this, sourceProp.GetValue(input));
					break;
				}
			}
		}
	}

Answer 1

You could use LINQ Join:

var person1 = new Person("1", "Paul");
var person2 = new Person("2", "John");
var person3 = new Person("3", "Jess");

var list1 = new[] { person1, person2, person3 };
var list2 = new[] { person1, person2 };

var joined = list1.Join(inner: list2,
	outerKeySelector: p1 => p1.Id,
	innerKeySelector: p2 => p2.Id,
	resultSelector: (p1, p2) => new { First = p1, Second = p2 }
);

foreach (var pair in joined) {
	Console.WriteLine($"{pair.First.FirstName} -> {pair.Second.FirstName}");
}

record Person(string Id, string FirstName);

Produces:

Paul -> Paul

John -> John

You'd just want to join by Name instead of Id. This is equivalent to an INNER JOIN in SQL.