Validate the Project
Now that the design of the page is complete, you should validate the project (Project | Validate) to check for errors. On validating, you will get a message saying that there are no errors or warnings.
•Warnings indicate design issues that might need your attention, but these issues are not fatal and will not prevent the solution from running.
•An error message, on the other hand—as opposed to a warning—would be fatal and should be remedied.
|A number of messages in the Messages window can be expanded to reveal more detail, and often contain clickable links that provide more information.