Htykuut

Working with a class:

DBContext:

public SDBContext() : base("name=SPDBContext")

        {

            this.Configuration.LazyLoadingEnabled = false;

        }

        public DbSet<Table1> table_1 { get; set; }

A Class with Annotation:

[Table("table_1")]

   public abstract class Table1

    {

        public int id { get; set; }

        public string name { get; set; }

        public DateTime? dt { get; set; }



    }

A normal Class to inherit the class above:

public class InheritTable1 : Table1

    {

        public String Address { get; set; }

        public static DataTable GetTable1()

        {

            try

            {

                DataTable dt = new DataTable();

                SDBContext sdb = new SDBContext();

                var getData = sdb.table_1.ToList();

                dt.Merge(CollecTables.ToDataTable(getData));

                return dt;

            }

            catch (Exception er)

            {

                throw er;

            }

        }

    }

Implementation:

dataGridView1.DataSource = InheritTable1.GetTable1();

If i remove this section of code:

public String Address { get; set; }

It is working well.

But if i run that code with public String Address { get; set; }

It returns an error:

Message = "Unknown column 'Extent1.Address' in 'field list'"

I knew this Extent1 means reading from Table1 Class. why it is treated as Table1 instead of InheritTable1.

All that i knew is:
A class that inherit an Abstract Class can Add a method anytime we wanted but my question is:

why it can't be done with it's own variable (with this class InheritTable1)?