ASP.NET Hosting Tutorial: Learn Exception Handling in C#

Exception Handling in C#
Handling exceptions in C# is a critical component of writing reliable and strong programs. It allows programmers to smoothly handle unexpected difficulties or extreme events that may happen while the application is operating. This is how exception handling works in C#.

Try-Catch Blocks
The try-catch block is C#'s fundamental exception handling method. A try block is used to surround code that may throw an exception, followed by one or more catch blocks to handle certain types of exceptions.

try
{
    // Code that might throw an exception
}
catch (Exception ex)
{
    // Handle the exception
}

Catch Blocks

To handle various kinds of exceptions, you can have more than one catch block. The catch block that matches the thrown exception type will be the first to run when the catch blocks are examined in order.

try
{
    // Code that might throw an exception
}
catch (FileNotFoundException ex)
{
    // Handle file not found exception
}
catch (Exception ex)
{
    // Handle other exceptions
}

Finally Block

You can use a finally block to specify code that should always execute, whether an exception occurs or not. This block is typically used for releasing resources or performing cleanup tasks.

try
{
    // Code that might throw an exception
}
catch (Exception ex)
{
    // Handle the exception
}
finally
{
    // Cleanup code
}

Throwing Exceptions

You can manually throw exceptions using the throw keyword. This allows you to signal exceptional conditions in your code.

if (condition)
{
    throw new Exception("An error occurred");
}

Custom Exceptions

You can define your own exception types by creating classes that derive from System.Exception. This allows you to create more meaningful and specific exceptions for your application.

public class CustomException : Exception
{
    public CustomException(string message) : base(message)
    {
    }
}

Exception handling is essential for writing robust and reliable C# applications, as it helps to gracefully handle errors and prevent unexpected program termination.

Happy Learning :)

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