High order function in C#

hof.cs

void Main()
{
	var add4To = AddNumber(4);
	var newNumber = add4To(3);
	Console.WriteLine(newNumber);
	// prints 7
}

public Func<int, int> AddNumber(int n)
{
	Func<int, int> t = (i) => i+n;
	return t;
}