Introduction

In this lesson, you will learn exception handling in C# for beginners. Exception handling helps you manage errors in a program so it does not crash.

What is Exception Handling?

Exception handling is used to handle runtime errors using try, catch, and finally blocks.

Basic Example

try
{
    int a = 10;
    int b = 0;
    int result = a / b;
}
catch (Exception ex)
{
    Console.WriteLine("Error: " + ex.Message);
}

try, catch, finally

try

Code that may cause error

catch

Handles the error

finally

Always runs (optional)

try
{
    Console.WriteLine("Try block");
}
catch
{
    Console.WriteLine("Error occurred");
}
finally
{
    Console.WriteLine("Always runs");
}

Common Exceptions

• DivideByZeroException
• NullReferenceException
• IndexOutOfRangeException

Real-World Use

• Prevent app crash
• Handle user input errors
• Improve application stability

Key Points

• Exception handling prevents crashes
• try-catch is used to handle errors
• finally block always executes

Internal Links

• Course Page: .NET Course for Beginners