Finally block behavior in C Sharp (C#) - Step-by-Step Execution

Concept Flow - Finally block behavior

Try block starts

↓

Code runs in try

↓

Exception?

Yes→Catch block runs

↓

Catch code runs

↓

Try block ends

↓

Catch ends

↓

Finally block runs ALWAYS

↓

Code after try-catch-finally

The finally block runs no matter what happens in try or catch, even if an exception occurs or not.

Execution Sample

C Sharp (C#)

try {
  Console.WriteLine("Try block");
  throw new Exception();
} catch {
  Console.WriteLine("Catch block");
} finally {
  Console.WriteLine("Finally block");
}

This code shows try throwing an exception, catch handling it, and finally always running.

Execution Table

Step	Code Executed	Exception Thrown?	Block Running	Output
1	Console.WriteLine("Try block")	No	Try	Try block
2	throw new Exception()	Yes	Try
3	Catch block runs	Handled	Catch	Catch block
4	Finally block runs	Handled	Finally	Finally block
5	Code after try-catch-finally	Handled	After

💡 Finally block runs always, then code continues after try-catch-finally.

Variable Tracker

Variable	Start	After Step 1	After Step 2	After Step 3	After Step 4	Final
ExceptionThrown	No	No	Yes	Handled	Handled	Handled

Key Moments - 3 Insights

Does the finally block run if an exception is thrown and caught?

Yes, as shown in execution_table rows 2, 3, and 4, finally runs after catch handles the exception.

What if no exception is thrown, does finally still run?

Yes, finally always runs after try block finishes, even if no exception occurs (not shown here but same logic).

Can finally block prevent the exception from propagating?

No, finally runs after catch handles exceptions; it cannot stop exceptions by itself (see execution_table row 4).

Visual Quiz - 3 Questions

Look at the execution_table, what is the output at Step 3?

A Try block

B Catch block

C Finally block

D No output

💡 Hint

Check the Output column at Step 3 in execution_table.

At which step does the finally block run?

A Step 2

B Step 3

C Step 4

D Step 5

💡 Hint

Look for 'Finally block runs' in the Code Executed column.

If the exception was not thrown, which step would be skipped?

A Step 3

B Step 2

C Step 4

D Step 5

💡 Hint

Catch block runs only if exception is thrown (Step 3).

Concept Snapshot

try { ... } catch { ... } finally { ... }
- finally block runs always, after try and catch
- runs even if exception thrown or not
- useful for cleanup actions
- exception handled in catch before finally
- code after finally runs next

Full Transcript

This example shows how the finally block behaves in C#. The try block runs first. If an exception is thrown, the catch block runs to handle it. Regardless of exception or not, the finally block always runs after try and catch. This ensures cleanup code runs no matter what. The execution table shows each step, the output printed, and when the exception is thrown and handled. The variable tracker shows the exception state changing from no to yes and then handled. Key moments clarify that finally runs always, even if no exception, and it cannot stop exceptions by itself. The quiz questions help check understanding of when finally runs and what outputs appear.