What is an IO exception C#?
IOException is the base class for exceptions thrown while accessing information using streams, files and directories. The Base Class Library includes the following types, each of which is a derived class of IOException : DirectoryNotFoundException.
How is I O exception helpful in handling I O errors?
Handling IOException This means that it can be thrown by any I/O operation. Because IOException is the base class of the other exception types in the System.IO namespace, you should handle in a catch block after you’ve handled the other I/O-related exceptions.
How do you handle IO exception?
When is IOException thrown IOException is the base exception class used for handling the failures. In a method of a class, try, catch, and finally block handles the exception. The application API class methods throw an IOException or its subclasses. Try catch finally block of code is shown below in different scenarios.
What causes Io exception?
It can throw an IOException when the either the stream itself is corrupted or some error occurred during reading the data i.e. Security Exceptions, Permission Denied etc and/or a set of Exceptions which are derived from IOEXception .
Why is IOException checked exception?
Because IOException is a checked exception type, thrown instances of this exception must be handled in the method where they are thrown or be declared to be handled further up the method-call stack by appending a throws clause to each affected method’s header.
What does IO exception mean?
IOException – Exception thrown when there has been an Input/Output (usually when working with files) error.
Is IOException a runtime exception?
Because IOException is a Checked Exception, which should be either handled or declared to be thrown. On contrary, RuntimeException is an Unchecked Exception.
Is exception good or bad?
Exceptions are not bad per se, but if you know they are going to happen a lot, they can be expensive in terms of performance. The rule of thumb is that exceptions should flag exceptional conditions, and that you should not use them for control of program flow.
What is the difference between runtime exception and exception?
An Exception is checked, and a RuntimeException is unchecked. Checked means that the compiler requires that you handle the exception in a catch, or declare your method as throwing it (or one of its superclasses).
What happens if a program does not handle an unchecked exception?
If your code does not handle and exception when it is thrown, this prints an error message and crashes the program.