C#6.0 Await in catch/finally blocks

C#6.0 introduces new features related to exception handling, including the ability to use await inside catch and finally blocks. This feature allows for more efficient exception handling and cleaner code.

Benefits of using Await in catch/finally blocks

By using await in catch and finally blocks, the code can be written more cleanly and efficiently. Instead of using complex error handling code, developers can use a simple await statement to handle exceptions.

The use of await in catch and finally blocks also allows developers to centralize error handling. Instead of having to write error handling code in multiple places in the application, all error handling can be centralized in one location.

Syntax

The syntax for using await in catch and finally blocks is as follows:

try 
{
    // code that may throw an exception
}
catch (Exception ex) 
{
    // catch the exception and handle it
    await HandleExceptionAsync(ex);
}
finally 
{
    // code that is always executed, regardless of whether an exception was thrown
}

Note that the await statement is still inside the catch/finally block. This means that if the HandleExceptionAsync method throws an exception, it will be caught and handled by the catch block.

Best practices

When using await in catch and finally blocks, there are some best practices that should be followed:

1. Use await only when necessary.

   While using await in catch and finally blocks can be efficient, it should only be used when necessary. If the error handling code is simple enough to be handled using traditional error handling techniques, then await should not be used.

2. Use centralized error handling.

   Centralized error handling is recommended when using await in catch and finally blocks. This will help avoid code duplication and make the code easier to maintain.

3. Use async all the way.

   When using await in catch and finally blocks, it is important to use async all the way. This means that all the methods in the call stack should be using the async/await pattern. This will help avoid deadlocks and improve performance.

Conclusion

The use of await in catch and finally blocks can lead to more efficient and cleaner code. By following the best practices outlined in this article, developers can take full advantage of this feature and improve the exception handling capabilities of their applications.