How to Best Handle Exceptions in C# Tasks?

Best Practices for Exception Handling in Tasks

Overview

Managing exceptions in System.Threading.Tasks.Task is crucial to ensure reliable and predictable code execution. This guide explores various approaches for effective exception handling in Tasks.

C# 5.0 and Above

In C# 5.0 and later, async and await simplify exception handling. Instead of using ContinueWith, async methods allow direct use of try/catch blocks.

try
{
    // Start the task.
    var task = Task.Factory.StartNew<StateObject>(() => { /* action */ });

    // Await the task.
    await task;
}
catch (Exception e)
{
    // Perform cleanup here.
}

C# 4.0 and Below

For earlier versions of C#, ContinueWith provides an alternative approach. By specifying TaskContinuationOptions.OnlyOnFaulted, you can specify that a continuation should only be executed if the task faulted:

// Get the task.
var task = Task.Factory.StartNew<StateObject>(() => { /* action */ });

// For error handling.
task.ContinueWith(t => { /* error handling */ }, context,
    TaskContinuationOptions.OnlyOnFaulted);

Multiple Continuations

Multiple continuations can handle both exceptional and successful cases:

// For error handling.
task.ContinueWith(t => { /* error handling */ }, context, 
    TaskContinuationOptions.OnlyOnFaulted);

// If it succeeded.
task.ContinueWith(t => { /* on success */ }, context,
    TaskContinuationOptions.OnlyOnRanToCompletion);

Base Class for Unified Exception Handling

In some scenarios, a base class can provide a centralized mechanism for exception handling across multiple classes. Your base class implementation could include a method to manage exceptions within calls to ContinueWith. However, this approach may not offer significant advantages over the aforementioned techniques, especially when using async and await.

By following these best practices, you can effectively handle exceptions in Tasks, ensuring the stability and reliability of your code.

The above is the detailed content of How to Best Handle Exceptions in C# Tasks?. For more information, please follow other related articles on the PHP Chinese website!