Any human cannot write 100% complete
bug free code, sometimes users might give unrealistic data to the application,
that might cause exceptions, some of the types of exceptions that should be
commonly handled in .net are :
Example for NullReferenceException
public static void handleNullException()
{
try
{
string name = null;
int
nameLength = name.Length;
}
catch (NullReferenceException ne)
{
Console.WriteLine("Exception :
" + ne.Message);
}
}
Example for DivideByZeroException
public static void handleDivideByZero()
{
try
{
int result = 20 / int.Parse("0");
}
catch (DivideByZeroException de)
{
Console.WriteLine("Exception :
" + de.Message);
}
}
Example for FormatException
public static void handleFormatException()
{
try
{
int
number = int.Parse("string");
}
catch (FormatException ce)
{
Console.WriteLine("Exception :
" + ce.Message);
}
}
Example for InvalidCastException
public static void handleCastException()
{
try
{
int
a = 10;
object data = "name";
int
b = (short)data;
}
catch (InvalidCastException ce)
{
Console.WriteLine("Exception :
" + ce.Message);
}
}
Example for IndexOutOfRangeException
public
static void
handleIndexOutofRange()
{
try
{
int[]
series = { 2, 8, };
for
(int i = 0; i < 2; i++)
{
int
aa = series[i + 3];
}
}
catch
(IndexOutOfRangeException ex)
{
Console.WriteLine("Exception : " + ex.Message);
}
}
Handling Multiple Exceptions in C#
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ExecptionProj
{
class Program
{
static void Main(string[] args)
{
try
{
//functionlity here.
}
catch (InvalidCastException ce)
{
Console.WriteLine("functionality
here");
}
catch (NullReferenceException nre)
{
Console.WriteLine("functionality
here");
}
catch (IndexOutOfRangeException iore)
{
Console.WriteLine("functionality
here");
}
catch (DivideByZeroException dbz)
{
Console.WriteLine("functionality
here");
}
catch (OutOfMemoryException om)
{
Console.WriteLine("functionality
here");
}
}
}
}