Can we have empty finally block?
As such, an empty finally block is most probably the sign of potential “resource leaks” that will jeopardize the application’s stability. Add code to the finally block, especially the release of resources used in the try block, if any.
When finally block is executed in C#?
It is a reserved keyword in C#. The finally block will execute when the try/catch block leaves the execution, no matter what condition cause it. It always executes whether the try block terminates normally or terminates due to an exception. The main purpose of finally block is to release the system resources.
Can we return value from finally block in C#?
No, the return value is set before the return statement is executed. Inbetween those two things, the finally block is executed. It therefore makes no sense to have a return statement in a finally block.
Why finally block is used in C#?
By using a finally block, you can clean up any resources that are allocated in a try block, and you can run code even if an exception occurs in the try block. Typically, the statements of a finally block run when control leaves a try statement.
What if try block is empty?
try block will work fine if nothing is in it . You cannot use any checked exception in a catch block if it is never thrown. so with the empty try block u can use catch with unchecked exceptions if exception is thrown or not but u can use checked exception only if it is thrown.
Does a Finally block always get executed in C#?
A finally block always executes, regardless of whether an exception is thrown.
Why finally block is always executed?
A finally block is always get executed whether the exception has occurred or not. If an exception occurs like closing a file or DB connection, then the finally block is used to clean up the code. We cannot say the finally block is always executes because sometimes if any statement like System.
Can finally block return value?
Yes, we can write a return statement of the method in catch and finally block.
When catch and finally block both return value?
When catch and finally block both return value, method will ultimately return value returned by finally block irrespective of value returned by catch block.
What happens if finally block throws an exception C#?
C# 4 Language Specification ยง 8.9. 5: If the finally block throws another exception, processing of the current exception is terminated. Unless it is a ThreadAbortException , then the whole finally block will be finished first, as it is a critical section.
Can finally block have return statement?
Yes, we can write a return statement of the method in catch and finally block. There is a situation where a method will have a return type and we can return some value at any part of the method based on the conditions.
When finally block executes in try catch finally?
The finally -block will always execute after the try -block and catch -block(s) have finished executing. It always executes, regardless of whether an exception was thrown or caught. You can nest one or more try statements.
What happens if there is no catch block?
If there is no catch block the programme will terminate giving the exception but still final block will execute. If there is only try block no catch and no final then it will give a compile error.
How do you make finally block should not execute?
1. When the System. exit() method is called in the try block before the execution of finally block, finally block will not be executed.
How do you prevent finally block from execution?
The finally block follows a try block or a catch block. A finally block of code always executes, irrespective of occurrence of an Exception. You cannot skip the execution of the final block. Still if you want to do it forcefully when an exception occurred, the only way is to call the System.
Can finally block have try catch?
No, we cannot write any statements in between try, catch and finally blocks and these blocks form one unit.
What happens if we return from finally block?
Returning from inside a finally block will cause exceptions to be lost. A return statement inside a finally block will cause any exception that might be thrown in the try or catch block to be discarded.