Basic Graphics Drawing Shape

Drawing Line with Class

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing; // Add to draw
using System.Threading.Tasks;

Drawing Rectangular with Mouse

namespace Zau_DrawRectWithMouse
{
    public partial class Form1 : Form
    {
        Bitmap bmap;
        Graphics g;

Using Color Dialog

namespace MouseEvents
{
    public partial class Form1 : Form
    {
        Bitmap bmap;
        Graphics g;
        Point pOne;

Draw Line Between Two Points with Mouse

namespace Zau_DrawLine_Btn_Two_Point_wMouse
{
    public partial class Form1 : Form
    {
        Bitmap bmap;

Mouse Event & Draw Line

namespace MouseEvents
{
    public partial class Form1 : Form
    {
        Bitmap bmap;
        Graphics g;

Plotting

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;

using System.Drawing.Drawing2D; //to use matrix