IT:AD:EF/CodeFirst/Migrations:HowTo:Coded Migration Examples/Add/Remove/Alter/Column

    public partial class LibHelpEntry01 : DbMigration
    {
        public override void Up()
        {
            AddColumn("dbo.XActLib_ApplicationHostSettings", "RenderMethodHints", c => c.String());
            AddColumn("dbo.XActLib_HelpEntry", "Order", c => c.Int(nullable: false));
            AlterColumn("dbo.XActLib_Resource", "Key", c => c.String(nullable: false, maxLength: 256));
        }
        
        public override void Down()
        {
            AlterColumn("dbo.XActLib_Resource", "Key", c => c.String(nullable: false, maxLength: 128));
            DropColumn("dbo.XActLib_HelpEntry", "Order");
            DropColumn("dbo.XActLib_ApplicationHostSettings", "RenderMethodHints");
        }

public override void Up()
{
    RenameColumn(table: "dbo.MyTypes", 
                 name: "SaleZipCodeId", newName: "ZipCodeId");
}

public override void Down()
{
    RenameColumn(table: "dbo.MyTypes", 
                 name: "ZipCodeId", newName: "SaleZipCodeId");
}