What are the differences between User Controls and Custom Controls?-tech08032012

1. User Controls are easy to create where as Custom Controls are difficult to create. 2. User Controls cannot be compiled into an assembly, where as Custom Controls can be compiled into an assembly. 3. User Controls cannot be added to tool box, where as Custom controls can be added to the toolbox. 4. You need to have a copy of user control in every project where you want to use it, where as this is not the case with custom controls. You can install a single copy of the Web custom control in the global assembly cache and share it between applications, which makes maintenance easier. 5. User controls are used for reusing existing user interface elements and code, but are not useful for developing reusable components for multiple web applications.