Complete set: Intro to C - Bill Buchanan

In the above example (assuming that the file c:\sosuchfile.txt does no exist) we get
the following output:
Output of Exceptions 3.2.2
Test started.
An exception was raised.
Finished.
Test completed.
The exception will be raised at the “new StreamReader” line – the following line
does not get executed, instead execution jumps to the catch block, then the finally
block then continues with the code outside the try/catch/finally structure.
Without the try blocks the whole method will fail and the stack will unwind.
There are different exceptions for different conditions.
Examples of Exceptions 3.2.3
System.NullReferenceException
System.DivideByZeroException
System.InvalidCastException
System.IO.FileNotFoundException
5.7 Finer control over exceptions
Introduction to .NET
A host of different exceptions exist. We can test for a specific exception by including
an exception reference in the catch clause. All exceptions inherit from System.Exception
– this will catch any exception.
We can perform further tests inside the catch block – we can examine ex.GetType()
to find out exactly what exception was raised.
Finer control
try
{
DateTime x = (DateTime) new Object();
}
catch (System.InvalidCastException ex)
{
MessageBox.Show("The cast was invalid");
}
catch (Exception ex)
{
MessageBox.Show("Some kind of error happened :^(\n"+
ex.ToString());
}
Agilent .NET Course: Module 5, page 6