C# winform 绘图窗体程序（含图层，前景色背景色，可以打开保存)

# Painter Simple drawing application created with Windows Forms and C# Features: - Simple brush tool - Can adjust color, opacity and size - Eraser - Can also adjust opacity and size - Line, rectangle/square, and ellipse/circle tools - Eyedropper (NOTE: it matters which layer is selected) - Layers - Can add, delete, reorder, and edit the name of layers, and toggle visibility for each - New dialog - Can select size of new canvas - Open dialog - Can open image types of .jpg, .png, and .gif