C# finally

C# finally block is used to execute important code which is to be executed whether exception is handled or not. It must be preceded by catch or try block.

Example #1

C# finally example if exception is handled

snippet

using System;
public class ExExample
{
    public static void Main(string[] args)
    {
        try
        {
            int a = 10;
            int b = 0;
            int x = a / b;
        }
        catch (Exception e) { Console.WriteLine(e); }
        finally { Console.WriteLine("Finally block is executed"); }
        Console.WriteLine("Rest of the code");
    }
}

Output

System.DivideByZeroException: Attempted to divide by zero. Finally block is executed Rest of the code

Example #2

C# finally example if exception is not handled

snippet

using System;
public class ExExample
{
    public static void Main(string[] args)
    {
        try
        {
            int a = 10;
            int b = 0;
            int x = a / b;
        }
        catch (NullReferenceException e) { Console.WriteLine(e); }
        finally { Console.WriteLine("Finally block is executed"); }
        Console.WriteLine("Rest of the code");
    }
}

Output

Unhandled Exception: System.DivideBy