Custom Validation Attribute to validate when a collection is null or empty

Custom Validation Attribute to validate when a collection is null or emptyhttps://www.dotnetzone.gr:443/cs/blogs/ppolyzos/archive/2016/02/29/custom-validation-attribute-to-validate-when-a-collection-is-null-or-empty.aspxA custom validation attribute allows you to create metadata, that you can use in the data model to validate data fields. In order to validate when a collection is null or empty, you may create a custom validation attribute, which returns false in caseenCommunityServer 2.1 SP3 (Build: 20423.1)