Learn Exception Handling in C#

Exception Handling in C#

In C#, handling exceptions is an essential part of developing dependable and solid code. It enables programmers to gracefully manage unforeseen problems or extraordinary circumstances that can arise while the programme is running. Here's how exception handling works in C#.

Try-Catch Blocks

The primary mechanism for handling exceptions in C# is the try-catch block. You enclose the code that might throw an exception within a try block, and then use one or more catch blocks to handle specific 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 :)