Difference between .ToString() and Convert.ToString()

Kiran Rani
Jan 30 2016
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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

Convert.ToString():

string str=null;
Console.WriteLine(Convert.ToString(str));

Above line will run successfuly,without throwung any error.

.ToString():

string str=null;
Console.WriteLine(str.ToString());

Above line will throw "NullReferenceException".