C# 文件正忙。我能'；不要删除它

我为这幅图像设置了版权。之后，我需要删除旧文件。但我不能，因为很忙。 我需要将受版权保护的文件从“受版权保护的”+imageFile重命名为imageFile

public static void SetImageCopyright(string imageFile)
        {
            #region 
            //create a image object containing the photograph to watermark
            Image imgPhoto = Image.FromFile(imageFile);
            int phWidth = imgPhoto.Width;
            int phHeight = imgPhoto.Height;

            //create a Bitmap the Size of the original photograph
            Bitmap bmPhoto = new Bitmap(phWidth, phHeight, PixelFormat.Format24bppRgb);

            bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);

            //load the Bitmap into a Graphics object 
            Graphics grPhoto = Graphics.FromImage(bmPhoto);


            //------------------------------------------------------------
            //Step #1 - Insert Copyright message
            //------------------------------------------------------------

            //Set the rendering quality for this Graphics object
            grPhoto.SmoothingMode = SmoothingMode.AntiAlias;

            //Draws the photo Image object at original size to the graphics object.
            grPhoto.DrawImage(
                imgPhoto,                               // Photo Image object
                new Rectangle(0, 0, phWidth, phHeight), // Rectangle structure
                0,                                      // x-coordinate of the portion of the source image to draw. 
                0,                                      // y-coordinate of the portion of the source image to draw. 
                phWidth,                                // Width of the portion of the source image to draw. 
                phHeight,                               // Height of the portion of the source image to draw. 
                GraphicsUnit.Pixel);                    // Units of measure 

            //-------------------------------------------------------
            //to maximize the size of the Copyright message we will 
            //test multiple Font sizes to determine the largest posible 
            //font we can use for the width of the Photograph
            //define an array of point sizes you would like to consider as possiblities
            //-------------------------------------------------------
            int[] sizes = new int[] { 25, 16, 12, 10, 8, 6, 4 };

            Font crFont = null;
            SizeF crSize = new SizeF();

            //Loop through the defined sizes checking the length of the Copyright string
            //If its length in pixles is less then the image width choose this Font size.
            for (int i = 0; i < 7; i++)
            {
                //set a Font object to Arial (i)pt, Bold
                crFont = new Font("arial", sizes[i], FontStyle.Bold);
                //Measure the Copyright string in this Font
                crSize = grPhoto.MeasureString("AlexMaslakov.ru", crFont);

                if ((ushort)crSize.Width < (ushort)phWidth)
                    break;
            }

            //Since all photographs will have varying heights, determine a 
            //position 5% from the bottom of the image
            int yPixlesFromBottom = (int)(phHeight * .05);

            //Now that we have a point size use the Copyrights string height 
            //to determine a y-coordinate to draw the string of the photograph
            float yPosFromBottom = ((phHeight - yPixlesFromBottom) - (crSize.Height / 2));

            //Determine its x-coordinate by calculating the center of the width of the image
            float xCenterOfImg = (phWidth / 2);

            //Define the text layout by setting the text alignment to centered
            StringFormat StrFormat = new StringFormat();
            StrFormat.Alignment = StringAlignment.Center;

            //define a Brush which is semi trasparent black (Alpha set to 153)
            SolidBrush semiTransBrush2 = new SolidBrush(Color.FromArgb(153, 0, 0, 0));

            //Draw the Copyright string
            //grPhoto.DrawString(Copyright,                 //string of text
            //    crFont,                                   //font
            //    semiTransBrush2,                           //Brush
            //    new PointF(xCenterOfImg + 5, yPosFromBottom + 5),  //Position
            //    StrFormat);

            //define a Brush which is semi trasparent white (Alpha set to 153)
            SolidBrush semiTransBrush = new SolidBrush(Color.FromArgb(153, 255, 255, 255));

            //Draw the Copyright string a second time to create a shadow effect
            //Make sure to move this text 1 pixel to the right and down 1 pixel
            grPhoto.DrawString("AlexMaslakov.ru",                 //string of text
                crFont,                                   //font
                semiTransBrush,                           //Brush
                new PointF(xCenterOfImg, yPosFromBottom),  //Position
                StrFormat);                               //Text alignment



            //------------------------------------------------------------
            //Step #2 - Insert Watermark image
            //------------------------------------------------------------

            //Create a Bitmap based on the previously modified photograph Bitmap
            Bitmap bmWatermark = new Bitmap(bmPhoto);
            bmWatermark.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);
            //Load this Bitmap into a new Graphic Object
            Graphics grWatermark = Graphics.FromImage(bmWatermark);

            //To achieve a transulcent watermark we will apply (2) color 
            //manipulations by defineing a ImageAttributes object and 
            //seting (2) of its properties.
            ImageAttributes imageAttributes = new ImageAttributes();

            //The first step in manipulating the watermark image is to replace 
            //the background color with one that is trasparent (Alpha=0, R=0, G=0, B=0)
            //to do this we will use a Colormap and use this to define a RemapTable
            ColorMap colorMap = new ColorMap();

            //My watermark was defined with a background of 100% Green this will
            //be the color we search for and replace with transparency
            colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
            colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);

            ColorMap[] remapTable = { colorMap };

            imageAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap);

            //The second color manipulation is used to change the opacity of the 
            //watermark.  This is done by applying a 5x5 matrix that contains the 
            //coordinates for the RGBA space.  By setting the 3rd row and 3rd column 
            //to 0.3f we achive a level of opacity
            float[][] colorMatrixElements = { 
                                                new float[] {1.0f,  0.0f,  0.0f,  0.0f, 0.0f},       
                                                new float[] {0.0f,  1.0f,  0.0f,  0.0f, 0.0f},        
                                                new float[] {0.0f,  0.0f,  1.0f,  0.0f, 0.0f},        
                                                new float[] {0.0f,  0.0f,  0.0f,  0.3f, 0.0f},        
                                                new float[] {0.0f,  0.0f,  0.0f,  0.0f, 1.0f}};
            ColorMatrix wmColorMatrix = new ColorMatrix(colorMatrixElements);

            imageAttributes.SetColorMatrix(wmColorMatrix, ColorMatrixFlag.Default,
                ColorAdjustType.Bitmap);
            #endregion

            //Replace the original photgraphs bitmap with the new Bitmap
            imgPhoto = bmWatermark;
            grPhoto.Dispose();
            grWatermark.Dispose();
            bmPhoto.Dispose();

            //save new image to file system.
             imgPhoto.Save("copyrighted_"+imageFile, ImageFormat.Jpeg);
            imgPhoto.Dispose();

        }

公共静态无效SetImageCopyright（字符串imageFile）
{
#区域
//创建包含要添加水印的照片的图像对象
Image imgPhoto=Image.FromFile（imageFile）；
int phWidth=imgPhoto.Width；
int phHeight=imgPhoto.Height；
//创建原始照片大小的位图
位图bmPhoto=新位图（phWidth、phHeight、PixelFormat.Format24bppRgb）；
bmPhoto.SetResolution（imgPhoto.HorizontalResolution，imgPhoto.VerticalResolution）；
//将位图加载到图形对象中
Graphics grPhoto=Graphics.FromImage（bmPhoto）；
//------------------------------------------------------------
//步骤#1-插入版权信息
//------------------------------------------------------------
//设置此图形对象的渲染质量
grPhoto.SmoothingMode=SmoothingMode.AntiAlias；
//将原始大小的照片图像对象绘制到图形对象。
grPhoto.DrawImage(
imgPhoto，//照片图像对象
新矩形（0，0，phWidth，phHeight），//矩形结构
0，//要绘制的源图像部分的x坐标。
0，//要绘制的源图像部分的y坐标。
phWidth，//要绘制的源图像部分的宽度。
phHeight，//要绘制的源图像部分的高度。
GraphicsUnit.Pixel）；//度量单位
//-------------------------------------------------------
//为了最大化版权信息的大小，我们将
//测试多个字体大小以确定最大可能的字体大小
//我们可以用来测量照片宽度的字体
/定义一个你想考虑的点大小数组
//-------------------------------------------------------
int[]大小=新的int[]{25,16,12,10,8,6,4}；
Font crFont=null；
SizeF crSize=新的SizeF（）；
//循环检查定义的大小，检查版权字符串的长度
//如果其长度（以像素为单位）小于图像宽度，请选择此字体大小。
对于（int i=0；i<7；i++）
{
//将字体对象设置为Arial（i）pt，粗体
crFont=新字体（“arial”，大小[i]，字体样式.粗体）；
//测量此字体中的版权字符串
crSize=grPhoto.MeasureString（“AlexMaslakov.ru”，crFont）；
如果（（ushort）crSize.Width<（ushort）phWidth）
打破
}
//由于所有照片都有不同的高度，请确定
//距离图像底部5%的位置
int-yPixlesFromBottom=（int）（phHeight*.05）；
//现在我们有了一个点大小，使用版权字符串高度
//确定用于绘制照片字符串的y坐标的步骤
浮动yPosFromBottom=（（phHeight-yPixlesFromBottom）-（crSize.Height/2））；
//通过计算图像宽度的中心来确定其x坐标
浮点数=FIMG=（phWidth/2）；
//通过将文字对齐设置为居中来定义文字布局
StringFormat StrFormat=新StringFormat（）；
StrFormat.Alignment=StringAlignment.Center；
//定义一个半透射黑色的笔刷（Alpha设置为153）
SolidBrush-semiTransBrush2=新的SolidBrush（颜色为argb（153,0,0,0））；
//绘制版权字符串
//grPhoto.DrawString（版权所有，//文本字符串
//crFont，//font
//半反式刷子2，//刷子
//新的点f（xCenterOfImg+5，yPosFromBottom+5），//位置
//标准格式）；
//定义半透光白色的笔刷（Alpha设置为153）
SolidBrush semiTransBrush=新的SolidBrush（Color.FromArgb（153255 255 255））；
//再次绘制版权字符串以创建阴影效果
//确保将此文本向右移动1个像素，向下移动1个像素
graphoto.DrawString（“AlexMaslakov.ru”，//文本字符串
crFont，//font
半转刷，//刷
新的点f（xCenterOfImg，yPosFromBottom），//位置
StrFormat）；//文本对齐
//------------------------------------------------------------
//步骤2-插入水印图像
//------------------------------------------------------------
//基于先前修改的照片位图创建位图
位图bmWatermark=新位图（bmPhoto）；
bmWatermark.SetResolution（imgPhoto.HorizontalResolution，imgPhoto.VerticalResolution）；
//将此位图加载到新的图形对象中
Graphics grWatermark=Graphics.FromImage（bmWatermark）；
//为了实现易逝水印，我们将应用（2）颜色
//通过定义ImageAttributes对象和
//设置（2）其属性。
图像属性
// Open the file here
Image original = Image.FromFile(file);

// Create a MemoryStream in which to save the image
MemoryStream originalStream = new MemoryStream();

// Save the Image to the MemoryStream
original.Save(originalStream, original.RawFormat);

// Dispose the original image, so you can overwrite it later
original.Dispose();

//Replace the original photgraphs bitmap with the new Bitmap
imgPhoto.Dispose();
imgPhoto = bmWatermark;