Exception and Types

Exception and Types

In C#, an exception is an error that occurs during the execution of a program. Exceptions can be caused by various factors, such as incorrect user input, system errors, or logical errors in the program itself. When an exception occurs, the program stops executing and the exception is thrown, which means that control is transferred to a special block of code that handles the exception. This block of code is called the exception handler.

C# provides several types of exceptions that can be used to handle different types of errors. Some of the common types of exceptions in C# include:

1. ArgumentException: This exception is thrown when an argument passed to a method is invalid.
2. ArgumentNullException: This exception is thrown when a null argument is passed to a method that doesn’t accept null arguments.
3. InvalidOperationException: This exception is thrown when an operation is performed on an object that is not in a valid state.
4. DivideByZeroException: This exception is thrown when an attempt is made to divide a number by zero.
5. IndexOutOfRangeException: This exception is thrown when an attempt is made to access an array or collection with an index that is outside the valid range.

In addition to these built-in exceptions, C# also allows developers to create custom exceptions by deriving from the Exception class. This can be useful when you need to handle specific types of errors that are not covered by the built-in exceptions.