can abstract class inherit another abstract class c#
asp.net-mvc-4, c#, entity-framework-5, inheritance
Solution
Sure, an abstract class can inherit from another class!!
The only time a class cannot inherit from another is when the class you wish to inherit from is sealed or has private constructors only.
Problem
I'm beginner in C# & EF. I got a silly doubt while designing my new sample aplication. Can an abstract inherits another abstract class ``` using System; using System.ComponentModel.DataAnnotations; namespace Spark.BusinessObjects.Common { public abstract class BOBase { public virtual int UpdatedBy { get; set; } [DataType(DataType.DateTime)] public virtual DateTime UpdatedOn { get; set; } } public abstract class MasterBOBase : BOBase { public virtual int CreatedBy { get; set; } [DataType(DataType.DateTime)] public virtual DateTime CreatedOn { get; set; } } } namespace Spark.BusinessObjects.UserManagement { using System; using System.Data.Linq.Mapping; using System.ComponentModel.DataAnnotations; using Spark.BusinessObjects.Common; [Table(Name = "tblUser")] public class User:BOBase { [Key] public virtual int UserID { get; set; } [StringLength(maximumLength:40,MinimumLength=10)] [DataType(DataType.EmailAddress)] public virtual string EMailID { get; set; } [StringLength(maximumLength: 20, MinimumLength = 6)] [DataType(DataType.Password)] public virtual string Password { get; set; } [StringLength(maximumLength: 20, MinimumLength = 3)] public virtual string FirstName { get; set; } [StringLength(maximumLength: 20, MinimumLength = 1)] public virtual string LastName { get; set; } [DataType(DataType.Date)] public virtual DateTime DOB { get; set; } } public class UserRole:MasterBOBase { [Key] public virtual int UserID { get; set; } public virtual int UserRoleName { get; set; } } } ``` I don't need CreatedBy & CreatedOn properties in my master tables.Can i use like above. Is it correct?