c# dpi aware applications

public Form1()
        {

            InitializeComponent();
            DPI_test();
        }
public void DPI_test()
        {
            //Specify Here the Resolution Y component in which this form is designed
            //For Example if the Form is Designed at 800 * 600 Resolution then   
            //DesignerHeight=600
            int i_StandardHeight = 768;
            //Specify Here the Resolution X component in which this form is designed
            //For Example if the Form is Designed at 800 * 600 Resolution then  
            //DesignerWidth=800
            int i_StandardWidth = 1366;
            int i_PresentHeight = Screen.PrimaryScreen.Bounds.Height;
            //Present Resolution Height
            int i_PresentWidth = Screen.PrimaryScreen.Bounds.Width;
            //Presnet Resolution Width
            f_HeightRatio = (float)((float)i_PresentHeight / (float)i_StandardHeight);
            f_WidthRatio = (float)((float)i_PresentWidth / (float)i_StandardWidth);
            this.AutoScaleMode = AutoScaleMode.None;//Make the Autoscale Mode=None
            this.Scale(new SizeF(f_WidthRatio, f_HeightRatio));
            foreach (Control c in this.Controls)
            {
                get_all_controls(c);
            }

            foreach (Control c in All_controls)
            {
                c.Scale(new SizeF(f_WidthRatio, f_HeightRatio));
                c.Font = new Font(c.Font.FontFamily, c.Font.Size * f_HeightRatio,  
                    c.Font.Style, c.Font.Unit, ((byte)(0)));
            }
        }
public void get_all_controls(Control control)
        {
            c_all.Add(control.Name);
            All_controls.Add(control);
            foreach (Control child in control.Controls)
            {
                get_all_controls(child);
            }
        }