VB.NET无法旋转图像中的字符串

Imports System.Drawing

Public Class ImageRotation
    Public Shared Function RotateImage(image As Image, angle As Single) As Image
        Dim rotatedImage As New Bitmap(image.Width, image.Height)

        Using graphics__1 As Graphics = Graphics.FromImage(rotatedImage)
            graphics__1.TranslateTransform(CSng(image.Width / 2), CSng(image.Height / 2))
            graphics__1.RotateTransform(angle)
            graphics__1.TranslateTransform(-CSng(image.Width / 2), -CSng(image.Height / 2))
            graphics__1.DrawImage(image, New Point(0, 0))
        End Using

        Return rotatedImage
    End Function
End Class

Dim originalImage As Image = Image.FromFile("path_to_image.jpg")
Dim rotatedImage As Image = ImageRotation.RotateImage(originalImage, 45)
rotatedImage.Save("path_to_save_rotated_image.jpg")