Umbraco uses standard ASP.NET validation controls and a validation summary.

Just implement them yourself and do some CSS (or find the appropriate CSS from Umbraco)

Do have any reference where I can have a look with the sample user control inside the edit content ? So I can see the css, etc

Which one is the best approach, Creating a user control which similar to datatype control and use it in custom edit pages or
Directly using the server control itself ?

Thanks

If you want to find the styles you have to dig into the Umbraco source yourself. And I don't know why you'd want to put data types onto a custom edit page rather than using the .NET controls themselves

Do you know what file I should look at ?

I need to put umbraco data type control because I need to use the content picker / date time picker from umbraco data type.
So I don't need to create my own style control.

Is that possible ?

Thanks

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