How to write and configure a custom provider for ASP.Net Healthmonitoring?

Question

I am looking for a step-by-step guide on creating and using a custom provider for ASP.Net Healthmonitoring.

So far, I have only worked with an email provider that generates error emails. Basically, I want to do the same, but with more flexibility:
I want to use the HealthMonitoring functions (I do not want to use the Application_OnError event in global.asax) so that I have access to the event that is generated as "OnNewHealthMonitoringEntry" with all the information provided in the email to run custom code.

Edit:
Based on the source code given here http://www.asp.net/general/videos/how-do-i-create-a-custom-provider-for-logging-health-monitoring-events I was able to create my own custom provider and implement it. Now I want to add some new attributes to configure my custom provider. This is what web.config looks like:

<healthMonitoring>
    <bufferModes>
        <add name="Log Notification" maxBufferSize="1" maxFlushSize="1" urgentFlushThreshold="1" regularFlushInterval="Infinite" urgentFlushInterval="00:00:10"/>
    </bufferModes>
    <providers>
        <add name="FileEventProvider" buffer="true" bufferMode="Log Notification" type="healthmonitoringtest.FileHealthMonitorEventProvider"/>
    </providers>
    <profiles>
        <add name="Custom" minInstances="1" maxLimit="Infinite" minInterval="00:00:00"/>
    </profiles>
    <rules>
        <add name="File Event Provider" eventName="All Errors" provider="FileEventProvider" profile="Custom"/>
    </rules>
</healthMonitoring>

If I try to add an attribute to the provider, for example

<providers>
    <add name="FileEventProvider" buffer="true" bufferMode="Log Notification" foo="bar"  type="healthmonitoringtest.FileHealthMonitorEventProvider"/>
</providers>

I get an error message:

An exception of type 'System.Configuration.ConfigurationErrorsException' occurred in System.Web.dll, but was not handled in the user code. The information: Unexpected attribute foo in configuration FileEventProvider.

, , healthMonitoring? , appSettings node, - ( healthMonitoring node). ?

Edit2: : http://www.tomot.de/en-us/article/6/asp.net/how-to-create-a-custom-healthmonitoring-provider-that-sends-e-mails

Answer 1

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Reflector, BufferedWebEventProvider, , , Initialize BufferedWebEventProvider , , , . Config NameValueCollection, BufferedWebEventProvider. , , , , , .

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public override void Initialize(string name, System.Collections.Specialized.NameValueCollection config)
    {
        foo = config["foo"];
        if (String.IsNullOrEmpty(foo))
        {
            // You can set a default value for foo
        }

        //remove foo from the config just like BufferedWebEventProvider with the other
        //attributes. Note that it doesn't matter if someone didn't proivde a foo attribute
        //because the NameValueCollection remains unchanged if you call its Remove method
        //and the name doesn't exist.
        config.Remove("foo");

        base.Initialize(name, config);
    }

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