C#

public class Dog { }
public class Cat { }
public class Rabbit { }

public class MyPetPreferenceComparer : IComparer
{
    #region IComparer Members

    public int Compare(object x, object y)
    {
        // if they are same type return 0
        if (x.GetType() == y.GetType())
            return 0;

        // I like cats best so if lhs is a cat it comes before whatever is rhs
        if (x is Cat)
        {
            return -1;
        }
                    
        if(x is Dog)
        {
            // lhs is a dog, if rhs is a rabbit dog comes before
            if (y is Rabbit)
                return -1;
            // otherwise dog comes after
            return 1;
        }
        // I like rabbits least so they always come after
        if (x is Rabbit)
            return 1;

        return 0;
    }

    #endregion
}

ArrayList list = new ArrayList();
list.Add(new Rabbit());
list.Add(new Cat());
list.Add(new Dog());
list.Add(new Cat());
list.Add(new Rabbit());
list.Add(new Dog());

list.Sort(new MyPetPreferenceComparer());
foreach (object obj in list)
{
    Console.WriteLine(obj.GetType().Name);
}

Cat
Cat
Dog
Dog
Rabbit
Rabbit

catch (IndexOutOfRangeException exception)
{
Console.WriteLine(exception.message);
}
Console.WriteLine("hello");
}
}

aratireddy wrote:

1.the tpe or namespace name could not be found

aratireddy wrote:

system.exception does not contain a definition for message

aratireddy wrote:

catch (Indexoutofrange Exception)

catch (IndexOutOfRangeException ex)
{
   Console.WriteLine(ex.message);
}