Solutions only apply to the native components of Microsoft Dynamics CRM. Each solution has one or more solution components.
Some of the solution components are required components. These are present on the target Microsoft Dynamics CRM system or included with the solution when it is imported. You cannot delete required components.
Create a component in the customization area of Microsoft Dynamics CRM or develop it outside of Microsoft Dynamics CRM. For more information about outside development, see the Microsoft Dynamics CRM SDK.