Difference between Convert.tostring and .tostring() method

The basic difference between them is “Convert.ToString(variable)” handles NULL values even if variable value become null but “variable.ToString()” will not handle NULL values it will throw a NULL reference exception error. So as a good coding practice using “convert” is always safe.

Example

//Returns a null reference exception for str.

string str;

object i = null;

str = i.ToString();

//Returns an empty string for str and does not throw an exception. If you dont

string str;

object i = null;

str = Convert.ToString(i);