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Event Receivers
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Workflows
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Can execute either before or after the operation
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Always executes after the operation
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Can cancel the operation
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Cannot cancel the operation as the item will have already been created
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Cannot be launched manually by the user
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Can be started manually by the user
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Not designed for user interaction
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Specifically designed for user interaction
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Can execute in response to many different actions, including deletes
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Can only execute in response to one of four events – Manual, an item being created, an item being edited, and an item being submitted for approval
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Must be created in Visual Studio
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Can be created with Visual Studio, Visio or SharePoint Designer
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Workflows are mostly used for business process implementation and Event receivers are mostly used for one time activity based on trigger.
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