Async in C# 5.0: Returning Progress During Operation

Async in C# 5.0

[…] you pass asynchronous methods as interface, IProgress<T>, which they (the methods) can call to give an indication of how they’re doing.
[…] The clever feature of Progress<T> is that it will capture the SynchronizationContext on construction, and use it to call your progress update code in the right thread.
[…] Be careful because objects are consumed on different thread […] Use an immutable type to avoid problems.

source: Async in C# 5.0

Technorati tags: C#,ASync
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