a developer's notebook
C# 7.0 adds a number of new features and brings the focus on data consumption, code simplification and performance. Perhaps the most interesting feature is tuples, a finite ordered list of values, of possibly different types, which is used to bundle related values together without having to create a specific type to hold them. Tuples are very good for performance reasons, as you don’t…
A 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 case the object is null or empty. public class NotNullOrEmptyCollectionAttribute : ValidationAttribute { public override bool IsValid(object value) { var collection = value as ICollection;…
In order to sort a collection of objects based on another list that contains the proper order, we can create an extension method that performs a `Join` between these two collections and pass a `func` as innerKeySelector argument to allow us to sort this collection based on whatever key we want. Example // Object that we are going to use class…
