you can throw exception in two ways.
1.throw. This will throw the caught exception.The throwed exception must be caught again.It will not reset the stack trace.
2.throw e or throw new CustomException : It behaves exactly same but it will reset the stack trace.
Experimentation of Throw vs Throw ex(throw new CustomException):
DivByZero Method:
private static void DivByZero()
{
int j = 0;
var result = 9/j; //Line No :45 in my program is the Cause of Exception
}
1.Throw:It does not reset the stack trace,instead preserves it and throws the exception
private static void thrwonigException(){
try
{
DivByZero();
}catch (DivideByZeroException e)
{
/*It will not reset stack trace,instead throws the caught exception */.
throw ;
}
}
It still maintains the line which causes the exception,
2.Throw e : Returns the line no 34 as cause of exception but not 45,the stack trace is reset after this line
private static void thrwonigException(){
try
{
DivByZero();
}
catch (DivideByZeroException e)
{
/*It will reset the stack trace and tells that this line is the cause of exception.
* It will not who caused the exception.
* */
throw e; //or throw new DivideByZeroException();
}
}
