ASP.Net Core MVC: Server Side AlphaNumeric TextBox Validation (Alphabets and Numbers) characters using Data Annotations

Here Mudassar Khan has explained with an example, how to perform AlphaNumeric TextBox Validation i.e. allow only Alphabet and Number characters validation on Server Side using Data Annotation in ASP.Net Core MVC. The AlphaNumeric TextBox Validation i.e. allow only Upper Case and Lower Case Alphabet and Number (Digits) characters validation will be performed on Server Side using Model class and Data Annotation attributes in ASP.Net Core MVC.