What are the basics of VB.NET?

here is a simple peice of code

Module Module1

Sub Main()

Dim a, b, c As Integer 'integer means number

Console.WriteLine("please enter two numbers") 'this displays text for the user

a = Console.ReadLine ' readline is when a user enters a number and hits enter

b = Console.ReadLine

Console.ReadLine()

c = a + b

Console.WriteLine(c)

Console.ReadLine()

End Sub

End Module