Asynchronous Operations in "Illustrated Tutorial of C#"

Apr 26, 2024#开发杂记173

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The use of BeginInvoke function for asynchronous programming in the book "C# Illustrated Tutorial" 5th edition resulted in an error message on newer .NET platforms, as BeginInvoke and EndInvoke functions are no longer supported in the latest .NET framework starting from version 4. This change is due to the introduction of Task-based Asynchronous Pattern (TAP) in the Task Parallel Library for asynchronous and parallel programming.

When reading the 21.9 Other Asynchronous Programming Patterns in the fifth edition of the book "C# Illustrated Tutorial," an error message was encountered when using the BeginInvoke function according to the example code:

Unhandled exception. System.PlatformNotSupportedException: Operation is not supported on this platform.

After consulting the documentation, starting from .NET Framework 4, the Task Parallel Library provides a new model for asynchronous and parallel programming, namely the Task-based Asynchronous Pattern (TAP). On the latest .NET platform, the BeginInvoke function and EndInvoke function are no longer supported. This is noted for reference.

References:

Migrating Delegate.BeginInvoke Calls for .NET Core