Setting a variable to be an object?

Question

C++ / C#

Example:

var tmp;
if(true or false){
  tmp = new FirefoxDriver();
} else {
  tmp = new ChromeDriver();
}

That is, the object can be anything.

Answer 1

To tell you the data type, or what? The simplest is Object. The most correct is the base type for both Drivers that inherit from it.

Answer 2

IMHO, it will be more correct to use interfaces

IDriver driver;
if (true or false)
{
    driver = new FirefoxDriver();
}
else
{
    driver = new ChromeDriver();
}

ChromeDriver and FirefoxDriver in turn inherit from the IDriver interface and implement its methods/properties