Create Print.md

Csharp/Print.md

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+# Printing in WinForms
+
+```cs
+private void PrintPage(object sender, PrintPageEventArgs e)
+{
+	formsPlot1.plt.Resize(e.MarginBounds.Width, (int)(e.MarginBounds.Width * .5));
+	formsPlot1.plt.Style(figBg: Color.White);
+	e.Graphics.DrawImage(formsPlot1.plt.GetBitmap(), e.MarginBounds.Left, e.MarginBounds.Top);
+}
+
+private void Print_Click(object sender, EventArgs e)
+{
+	var pd = new PrintDocument();
+	pd.PrintPage += new PrintPageEventHandler(PrintPage);
+	if (new PrintDialog { Document = pd }.ShowDialog() == DialogResult.OK)
+		pd.Print();
+}
+
+private void PrintPreview_Click(object sender, EventArgs e)
+{
+	var pd = new PrintDocument();
+	pd.PrintPage += new PrintPageEventHandler(PrintPage);
+	new PrintPreviewDialog { Document = pd }.ShowDialog();
+}
+```