How to add attributes to a base class's properties

Question

I have a couple model classes like so:

public class MyModelBase {     public string Name { get; set; } }  public class MyModel : MyModelBase {     public string SomeOtherProperty { get; set; } } 

How can MyModel add a [Required] attribute to the Name property?

Answer 1

Declare the property in the parent class as virtual:

public class MyModelBase {     public virtual string Name { get; set; } }  public class MyModel : MyModelBase {     [Required]     public override string Name { get; set; }      public string SomeOtherProperty { get; set; } } 

Or you could use a MetadataType to handle the validation (as long as you're talking about DataAnnotations...otherwise you're stuck with the example above):

class MyModelMetadata {     [Required]     public string Name { get; set; }      public string SomeOtherProperty { get; set; } }  [MetadataType(typeof(MyModelMetadata))] public class MyModel : MyModelBase {     public string SomeOtherProperty { get; set; } }