42 lines
913 B
Plaintext
42 lines
913 B
Plaintext
== Why is this an issue?
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Delegate event handlers (i.e. delegates used as type of an event) should have a very specific signature:
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* Return type ``++void++``.
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* First argument of type ``++System.Object++`` and named 'sender'.
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* Second argument of type ``++System.EventArgs++`` (or any derived type) and is named 'e'.
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This rule raises an issue whenever a ``++delegate++`` declaration doesn't match that signature.
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=== Noncompliant code example
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[source,text]
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----
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public delegate void AlarmEventHandler(object s);
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public class Foo
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{
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public event AlarmEventHandler AlarmEvent; // Noncompliant
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}
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----
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=== Compliant solution
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[source,text]
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----
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public delegate void AlarmEventHandler(object sender, AlarmEventArgs e);
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public class Foo
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{
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public event AlarmEventHandler AlarmEvent; // Compliant
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}
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----
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== Resources
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https://msdn.microsoft.com/en-us/library/edzehd2t.aspx[Handling and Raising Events]
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