运行无效果，请问大佬是什么原因？
Dim G As Graphics = CreateGraphics()
Dim ziti As Font = RichTextBox1.Font
Dim yanse As New SolidBrush(Color.Blue)
G.DrawString("1", ziti, yanse, New Point(0, 0))
Dim ziti As Font = RichTextBox1.Font
Dim yanse As New SolidBrush(Color.Blue)
G.DrawString("1", ziti, yanse, New Point(0, 0))
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