How To Check if a String or TextBox is Empty or Null in C#

To check if a string or textbox is empty, simply follow the code snippet below.

if (!string.IsNullOrEmpty(textboxName.Text)
{
   //This will if a textbox is not empty
}

if (!string.IsNullOrEmpty(stringName)
{
   //This will if a string variable is not empty
}