Char interpretation via ORM

[Charlie]

Hello,
Could someone please explain why when generating the ORM DAL -   ORM would interpret field with the same domain differently.
DMS being used is FireBird 2.0   - simple customer table -
Customer(
Fax Char(10) ,
County Char(1)  
)

here's the generated code  - why the System.Null<System.Char> type???? 

        private string fAX;
       
        [Column("FAX", OpenAccessType = OpenAccessType.Character, IsNullable = true, Length = 10, SqlType = "CHAR")]
        [Storage("fAX")]
        public virtual string FAX
        {
            get
            {
                return this.fAX;
            }
            set
            {
                this.fAX = value;
            }
        }
       
        private System.Nullable<System.Char> cOUNTRYID;
       
        [Column("COUNTRYID", OpenAccessType = OpenAccessType.Character, IsNullable = true, Length = 1, SqlType = "CHAR")]
        [Storage("cOUNTRYID")]
        public virtual System.Nullable<System.Char> COUNTRYID
        {
            get
            {
                return this.cOUNTRYID;
            }
            set
            {
                this.cOUNTRYID = value;
            }
        }
       

Thanks -

[Damyan Bogoev]

Hi Charlie,

Telerik OpenAccess ORM maps a property mapped to a column of type char(1) as char property. The column allows null that’s why the generated property is Sysem.Nullable<Char>. Column of type char(n) where n less than 1 is being mapped to a string property.
Hope that helps.

All the best,
Damyan Bogoev
the Telerik team