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This article mainly introduces the relevant knowledge of what the syntax of C# exception handling is, the content is detailed and easy to understand, the operation is simple and fast, and has a certain reference value. I believe you will gain something after reading this article on the syntax of C# exception handling. Let's take a look.

Exceptions are problems that occur during program execution. An exception in C # is a response to a special situation that occurs when the program is running, such as trying to divide by zero.

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

Try: a try block identifies a code block of a specific exception that will be activated. Followed by one or more catch blocks.

Catch: the program catches an exception through an exception handler. The catch keyword indicates the catch of an exception.

The finally:finally block is used to execute a given statement, regardless of whether the exception is thrown or not. For example, if you open a file, it will be closed regardless of whether there is an exception or not.

Throw: when a problem occurs, the program throws an exception. Use the throw keyword to do this.

Grammar

Suppose an exception will occur in a block, and a method catches the exception using the try and catch keywords. The code within the try/catch block is protected code, using the try/catch syntax as follows:

Try

{

/ / statement that caused the exception

}

Catch (ExceptionName E1)

{

/ / error handling code

}

Catch (ExceptionName e2)

{

/ / error handling code

}

Catch (ExceptionName eN)

{

/ / error handling code

}

Finally

{

/ / statement to be executed

}

You can list multiple catch statements to catch different types of exceptions to prevent try blocks from generating multiple exceptions in different situations.

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