Answer / hima sijo

convert.tostring handles Null value also where
Variable.tostring wont handle null value.It throw exception

Answer / abdul

Convert.ToString handles null where as simple
variable.ToString() doesn;t;

But Convert class is an optimization cost, when we use
inside any loop, need to minimize it

Sample ToString();

Will Work
int salary = 10000;
string oldSalary = salary.tostring();

Will Throw exeption
int salary = null;
string oldSalary = salary.tostring(); ---> throws exception

Sample Convert.ToString()
Will Work
int salary = 10000;
string oldSalary = Convert.ToString(salary);

Will Work
int salary = null;
string oldSalary = Convert.ToString(salary); null will return

Answer / sanjib ghosh

Dim salary As Int16
Dim oldSalary As String = salary.ToString()
Dim newSalary As String = Convert.ToString(salary)
MsgBox(oldSalary & "")
MsgBox(newSalary & "")
''No exception throw

both work same function

Answer / pavel

object ss =null;

string s1 = ss.ToString(); ---------- exeption
string s2 = Convert.ToString(ss); --- ""

--------------------
int ss =null; --- int can't be converted to null

--------------------
int ss = 1;

string s1 = ss.ToString(); ---------- "1"
string s2 = Convert.ToString(ss); --- "1"

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i have a question which is quite simple but yet complicated for me my question is why do we use void, if it does not return anything to the compiler? if it is used for normal display it can also be done by what is called Console.Write() or Consol.WriteLine() and if i do not use void with my method then my compiler throws me an error. if i return a value say integer then i write public int fun() display of the result can also be done here then why is it so necessary to use void with a function and why so compiler throw us an error if v don't use void return type?

2 Answers  

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