VB.NET 中的函数是高阶函数吗？

Delegate Function Operation(x As Integer, y As Integer) As Integer

Sub Main()

    Console.WriteLine(Evaluate(AddressOf Add, 55, 66))
    Console.WriteLine(Evaluate(AddressOf [Sub], 100, 36))
    Console.WriteLine(Evaluate(AddressOf Multiply, 5, 66))
    Console.WriteLine(Evaluate(AddressOf Div, 500, 55))

    Console.ReadKey()

End Sub

Function Evaluate(f As Operation, x As Integer, y As Integer) As Integer
    Return f(x, y)
End Function

Function Add(x As Integer, y As Integer) As Integer
    Return x + y
End Function

Function [Sub](x As Integer, y As Integer) As Integer
    Return x - y
End Function

Function Multiply(x As Integer, y As Integer) As Integer
    Return x * y
End Function

Function Div(x As Integer, y As Integer) As Integer
    Return x / y
End Function