How do I find the reference of listexceptionhandler ?

See more:

C#

ASP.NET

SharePoint

I tried to use a specific Exception handler

public override void ItemAdding(SPItemEventProperties properties)
{
try
{
incidentManagementRepository.WriteToHistory(
string.Format(CultureInfo.CurrentCulture, TaskCreatedMessage,
properties.AfterProperties[TitleField]));
}
catch (Exception ex)
{
ListExceptionHandler handler = new ListExceptionHandler();
handler.HandleListItemEventException(ex, properties,
Resources.HandleListItemEventExceptionValue);
}
}

but it raise the error
The type or namespace name 'ListExceptionHandler' could not be found (are you missing a using directive or an assembly reference?)
and there is no reference to add it to my code.

What I have tried:

https://msdn.microsoft.com/en-us/library/ff647598.aspx