Remove String

How can i remove the Last 3 char in a string?
the string can change length..
please help
thanks

VB Code:

Module Module1
 
    Sub Main()
        Dim myString As String = "myString123"
        Console.WriteLine(myString.Substring(0, myString.Length - 3))
        Console.ReadLine()
    End Sub
 
End Module

thanks for your help
I am learning vb.net one step at a time :)