Four methods in static class MyForms.cs (1) center and size a form (2) center a control on a form (3) center a control horizontally only on a form (4) change the font and font style of a control

MyForms.cs

using System;
using System.Drawing;
using System.Windows.Forms;

namespace com.williambryanmiller.forms {

    class MyForms {

        public static void centerAndSizeForm(Form f, int frm_width, int frm_height) {

            /* Note: you may still need to set properties for .Show() and .TopMost if
               you are going to be showing multiple forms simultaneously
             
              SAMPLE USAGE:
             * 
             MyForms.centerAndSizeForm(this, 600, 400);

             Form f2 = new Form();
             f2.Text = "Form 2";
             f2.Show();
             MyForms.centerAndSizeForm(f2, 500, 300);
             f2.TopMost = true;

             Form f3 = new Form();
             f3.Text = "Form 3";
             f3.Show();
             MyForms.centerAndSizeForm(f3, 400, 200);
             f3.TopMost = true;

             Form f4 = new Form();
             f4.Text = "Form 4";
             f4.Show();
             MyForms.centerAndSizeForm(f4, 300, 130);
             f4.TopMost = true;
             * 
             */

            f.Size = new Size(frm_width, frm_height);
            
            System.Windows.Forms.Screen src = System.Windows.Forms.Screen.PrimaryScreen;
            int src_height = src.Bounds.Height;
            int src_width = src.Bounds.Width;
            //put the form in the center of the screen
            f.Left = (src_width - frm_width) / 2;
            f.Top = (src_height - frm_height) / 2;
        }

        public static void centerCtrlOnForm(Form f, Control c) {
            //centers a control on a form, both vertically and horizontally
            int x = (f.Width - c.Width) / 2;
            int y = (f.Height - c.Height) / 2;
            c.Location = new Point(x, y);
        }

        public static void centerCtrlOnFormHorizontally(Form f, Control c) {
            int x = (f.Width - c.Width) / 2;
            c.Location = new Point(x, c.Location.Y);
        }

        public static void setFontOfControl(Control c, string fontname, int fontsize, bool bold, bool italics) {
            FontStyle fs = new FontStyle();
            if (bold) {
                if (italics) {
                    fs = FontStyle.Bold | FontStyle.Italic;
                } else {
                    fs = FontStyle.Bold;
                }
            } else {
                if (italics) {
                    fs = FontStyle.Italic;
                } else {
                    fs = FontStyle.Regular;
                }
            }

            // Surround the following with a try-catch, because user may pass invalid parameter for fontname or fontsize

            try {
                Font myFnt = new Font(fontname, fontsize, fs);
                c.Font = myFnt;
            } catch (Exception ex) {
                MessageBox.Show(ex.Message);
            }
        }
    }

}