从MetaTable添加/删除MetaColumn

table.Column

[MetadataType(typeof(FooMetadata))]
[TableGroupName(\"Foo\")]
    public partial class Foo 
{ 

        [ScaffoldColumn(true)]
        public string MyNewColumnNotinDBTable
        {
            get
            {
                return \"FooBar\";
            }
        }
}



 public class FooMetadata
    {
        [ScaffoldColumn(false)]     // hide Id column
        public object Id { get; set; }


        public object Name { get; set; }

        public object MyNewColumnNotinDBTable { get; set; }
    }