What are data annotations in ASP.NET Core?
Data annotations are attributes used in ASP.NET Core to specify validation rules and metadata for model properties.
Can you give me some examples of common data annotations?
Sure! Common data annotations include [Required], [StringLength], [Range], and [EmailAddress].
How do I use the [Required] annotation?
You can use the [Required] annotation by placing it above a property in your model class to indicate that it must have a value.
What happens if a required field is not filled?
If a required field is not filled, the model validation will fail, and an error message will be returned.
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