vb基础语法问题

在VB.Net里,
!=null
=null怎么写

++x
--x
x++
x--
这些又怎么写?

---

<>Nothing
=Nothing

x += 1
x -= 1

两个语言不仅仅是语法上不同，比如VB.Net就没有++ --前后之说，再比如：C# code:
for (i = 0; i < 5; i++) {
...
}
VB.NET code:
For i = 0 To 4
...
Next


VB.Net的Nothing和C#的null概念也不完全相同。

---

在vb里if语句里的x++怎么表达呢?

---

C# code:
greeting = age < 20 ? "What's up?" : "Hello";

if (age < 20)
greeting = "What's up?";
else
greeting = "Hello";

// Multiple statements must be enclosed in {}
if (x != 100 && y < 5) {
x *= 5;
y *= 2;
}




No need for _ or : since ; is used to terminate each statement.





if (x > 5)
x *= y;
else if (x == 5)
x += y;
else if (x < 10)
x -= y;
else
x /= y;




// Every case must end with break or goto case
switch (color) { // Must be integer or string
case "pink":
case "red": r