In order to give a nicer developer experience composing validation messages there are broad categories of libraries that either work well in a Java/C# style setting or work well when composing functions. Attribute based validation libraries The default style that can be seen in many java and C# projects is the attribute based validation approach. public class Person { [MinLength(1,ErrorMessage ="NameBetween1And50"), MaxLength(50,ErrorMessage ="NameBetween1And50")] public string Name{get;set;} [Ema[...]