/-->. PDF - Download C# Language for free. (C#) The example below show you how to: Make a filed "required" Change the "display name" for what the clients see Denotes the field as an "email" type Data annotation is the categorization and labeling of data for AI applications. 1 date is required. Learn Angular 6 tutorials step by step for beginners, Learn Angular 2/4 for beginners (step by step), Step by Step Mathematics for Data Science, Learn Data structures and Algorithm Step by Step, How to copy or move Excel worksheets in C#, How to convert PDF to Excel and PDF to Word in C#/VB.NET, How to host ASP.NET Core 3.x MVC application on server, How to publish .NET Core 3.x MVC application from Visual Studio 2019, Same action method and different parameters in .NET core, Learn MSBI Step by Step Part 1 (Installation). Youll be auto redirected in 1 second. Logos, company names used here if any are only for reference purposes and they may be respective owner's right or trademarks. "Data Annotation provides attribute classes that are used to define metadata for ASP.NET MVC and ASP.NET data controls." Why would I use Data Annotation? Labeling the data makes objects recognizable to computer vision, which further trains the machine.