Why does this IF statement return false?

Question

I have two text boxes and I want skip a block of code only when both are empty:

if (txtBox1.Text.Trim() != string.Empty && txtBox2.Text.Trim() != string.Empty )
{
     // Do something
}

If either of the text boxes has something, I want the //Do something part to execute. Only when both are empty do I want to skip.

However the above code fragment doesn't work. Why?

Answer 1

I believe you have your logical operators mixed up. What you're looking for is

if (txtBox1.Text.Trim() != string.Empty || txtBox2.Text.Trim() != string.Empty )
{
     // Do something
}

Answer 2

You should replace your && with ||. Currently, the code in the if block will only be executed if both text fields have text in them.