How to use Exception Handling C# CSharp Error Handling Exception Handling C# Programming Guide

C# – Exception Handling
An exception is a problem that arises during the execution of a program. A C# exception is a response to an exceptional circumstance that arises while
a program is running, such as an attempt to divide by zero.

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Exceptions provide a way to transfer control from one part of a program to another. C# exception handling is built upon four keywords: try, catch, finally, and throw.

try − A try block identifies a block of code for which particular exceptions is activated. It is followed by one or more catch blocks.

catch − A program catches an exception with an exception handler at the place in a program where you want to handle the problem. The catch keyword indicates the catching of an exception.

finally − The finally block is used to execute a given set of statements, whether an exception is thrown or not thrown. For example, if you open a file, it must be closed whether an exception is raised or not.

throw − A program throws an exception when a problem shows up. This is done using

Exception Handling (C# Programming Guide)
A try block is used by C# programmers to partition code that might be affected by an exception. Associated catch blocks are used to handle any resulting exceptions. A finally block contains code that is run whether or not an exception is thrown in the try block, such as releasing resources that are allocated in the try block. A try block requires one or more associated catch blocks, or a finally block, or both.

The following examples show a try-catch statement, a try-finally statement, and a try-catch-finally statement. Guide)