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Think of event registration as listening for a signal. &nbsp;Consider a &quot;Notifying&quot; diagnostic event that sends a string of internal status messages. &nbsp;You could register a function to this event that writes the strings to a text box when a user clicks a &quot;Enable Diagnostics&quot;. &nbsp;But what about when they what to stop the messages. &nbsp;You could simply unregister the function (the &quot;-=&quot; operator) when the &quot;Disable Diagnostics&quot; button was clicked.
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Thanks for the explanation. Can I get an example where data download completion triggers an event?
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1. If I want to write code in C# where when data coming from a webservice is completed, an event (custom event) is triggered. So I can perform certain events when data download is complete.<br />
2. Another peice of code is where I'm loading the data on a control, and I want to trigger a custom made event when data is complete for display.<br />
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This will need registering of delegates. Is there a scenario, where we would unregister an event or delegate (what would be the purpose of doing that?)
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1. If I want to write code in C# where when data coming from a webservice is completed, an event (custom event) is triggered. So I can perform certain events when data download is complete.
2. Another peice of code is where I'm loading the data on a control, and I want to trigger a custom made event when data is complete for display.

This will need registering of delegates. Is there a scenario, where we would unregister an event or delegate (what would be the purpose of doing that?)

C# custom event handling for download complete

C# is an object-oriented programming language created in conjunction with Microsoft’s .NET framework. Compilation is usually done into the Microsoft Intermediate Language (MSIL), which is then JIT-compiled to native code (and cached) during execution in the Common Language Runtime (CLR).