Not able to understand the example

[vrdevendra]

[Enter feedback here]
Can anyone please explain how the MultiHandler method will call to the this.button1.KeyDown and this.button1.MouseClick event?
It would be great if anyone completes the solution, this solution is a little hard to understand.

Document Details

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• ID: f38da104-ca1b-7cc2-15d6-f6486c818e60
• Version Independent ID: 98d90b16-a4d0-d532-9fea-c51f6e262288
• Content: Using Variance in Delegates (C#)
• Content Source: docs/csharp/programming-guide/concepts/covariance-contravariance/using-variance-in-delegates.md
• Product: dotnet-csharp
• Technology: csharp-advanced-concepts
• GitHub Login: @BillWagner
• Microsoft Alias: wiwagn

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Associated WorkItem - 446782

[kosist]

I guess that this is vice versa - when events "KeyDown" or "MouseClick" will be triggered (raised), then "MultiHandler" will be executed, because this is event handler of those two different events. (in your question it sounds like MultiHandler method will call KeyDown or MouseClick, which I guess is not correct). And, we can assign this event handler to those events, because they both have event arguments, derived from the same base type (KeyEventArgs and MouseEventArgs are of the type EventArgs).