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IMyMethod item = myClassInstance as IMyMethod;
item.MyMethod();					

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        public void CallMethod(object o)
        {
            var t = o.GetType();
            var m = t.GetMethod("MyMethod");
            if (m != null)
                m.Invoke(o, null);
        }					

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private void IterateThrough()
        {

            foreach (System.Windows.Forms.Control einControl in LayoutReference.Controls)
            {
                if (einControl != null)
                {

                    if (einControl.GetType().ToString().Contains("Grid"))
                    {
                        var t = einControl.GetType();
                        var m = t.GetProperty("MainView");
                        

                        var k = m.GetValue(einControl, null);
                        CallMethod(k, "SaveLayoutToStream");
                    }
                }
            }
        }

        private void CallMethod(object o, String fktName)
        {
            //var u = (DevExpress.XtraGrid.Views.Grid.GridView) o;
            var t = o.GetType();

            Type[] Parameter = new Type[1];

            Parameter.SetValue(typeof(System.String), 0);

            object[] blub = { LayoutStream };
            var m = t.GetMethod(fktName, Parameter);
            if (m != null)
                m.Invoke(o, blub);

            LayoutStream.Seek(0, System.IO.SeekOrigin.Begin);
        }					

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private void IterateThrough()
{
    foreach (System.Windows.Forms.Control einControl in LayoutReference.Controls)
    {
        DevExpress.XtraGrid.GridControl grid = einControl as DevExpress.XtraGrid.GridControl;
        if (grid != null)
        {
            grid.MainView.SaveLayoutToStream(LayoutStream);
            LayoutStream.Seek(0, System.IO.SeekOrigin.Begin);
        }
    }
}