John Paul R John-Paul-R

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I think what might clarify is how events work. (Note, this is a long answer, tailored to your example. For something shorter, but less specific, see https://stackoverflow.com/a/33964976/8105643)

The event keyword is really just a nice syntax for setting up an EventHandler Delegate.

Now we understand that events are just special syntax delegates, we can explain how subscribing to an event actually works, and show how the two examples you gave are actually quite similar:

In your first example, you have essentially this situation:

public class DelegateCombineExample {

doing an operation on two numbers will give you a different output type depending on what the types of the operands are.

an "operation" is something like "addition" (+) or division (/).
an "operand" is one of the things you're doing the operation on.

for example, in 3 - 2, 3 is the first operand, 2 is the second operand, and subtraction (-) is the operation.

For our case, we're working with 2 types:

	<Project Sdk="Microsoft.NET.Sdk">

	<PropertyGroup>
	<OutputType>Exe</OutputType>
	<TargetFramework>net7.0</TargetFramework>
	<ImplicitUsings>enable</ImplicitUsings>
	<Nullable>enable</Nullable>
	</PropertyGroup>

	<ItemGroup>