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C# C# Objects Inheritance Throwing Exceptions

Posted by Tiago Ramos
Tiago Ramos
2,380 Points

how to throw System.Exception?

Isn't this the way I can catch an Exception and throw the System.Exception?

Program.cs 
int value = int.Parse(Console.ReadLine());

Console.WriteLine(string.Format("You entered {0}",value));

try
{
    value < 0;
}
catch(Exception)
{
    Console.WriteLine(System.Exception);
}

2 Answers

Henrik Christensen
seal-mask
.a{fill-rule:evenodd;}techdegree
Henrik Christensen
Python Web Development Techdegree Student 38,322 Points
Henrik Christensen
.a{fill-rule:evenodd;}techdegree
Henrik Christensen
Python Web Development Techdegree Student 38,322 Points

try/catch is only for running running code that might throw an exception.

In this challenge you're not asked to use a try/catch, but you're asked to check something and throw an exception if the condition is false..

Sometimes it can be helpful to write comments about the challenge like this:

// if the value integer is less than 0 or greater than 20
  // throw an exception
Tiago Ramos
Tiago Ramos
2,380 Points

Geeez Henrik you're the best, I've just made it ;)

keep on rocking!

Henrik Christensen
seal-mask
.a{fill-rule:evenodd;}techdegree
Henrik Christensen
Python Web Development Techdegree Student 38,322 Points
Henrik Christensen
.a{fill-rule:evenodd;}techdegree
Henrik Christensen
Python Web Development Techdegree Student 38,322 Points

Catching and throwing exceptions are two different things

catching exception

try
{
    // something
}
catch (System.Exception)  // (System.Exception e) if you need the variable
{
    // do something
}

throwing an exception

throw new System.Exception();
Tiago Ramos
Tiago Ramos
2,380 Points

Thanks Henrik

I tried throw the System.Exception, but still didn't make it

try { value < 0; } catch () { throw new System.Exception(); }