# 学习记录1（C#-解决内存泄漏的几种方法）_c#解决内存泄漏

            myImageCodecInfo = GetEncoderInfo("image/jpeg");
            myEncoder = Encoder.Quality;

            myEncoderParameters = new EncoderParameters(1);

            Int64 ratio = Convert.ToInt64(TextBlock_Compress.Text);
            myEncoderParameter = new EncoderParameter(myEncoder, ratio);
            myEncoderParameters.Param[0] = myEncoderParameter;

            Bitmap bitMap = null;

            //Bitmap map2 = new Bitmap(img2);
            
            if (fused)
            {
                //using (Image img1 = Image.FromFile(sourcefiles[i_1]))
                {
                    Image img1 = Image.FromFile(sourcefiles[i_1]);
                    //Bitmap map1 = new Bitmap(img1);
                    //using ())
                    { Image img2 = Image.FromFile(sourcefiles[i_1 + 1]);
                        var width = img1.Width + img2.Width;
                        var height = img1.Height;
                        // 初始化画布(最终的拼图画布)并设置宽高
                        bitMap = new Bitmap(width, height);
                        // 初始化画板
                        //using ()
                        {
                            Graphics g1 = Graphics.FromImage(bitMap);
                            // 将画布涂为白色(底部颜色可自行设置)
                            g1.FillRectangle(System.Drawing.Brushes.White, new System.Drawing.Rectangle(0, 0, width, height));

                            //在x=0，y=0处画上图一
                            g1.DrawImage(img1, 0, 0, img1.Width, img1.Height);

                            //在x=0，y在图一往下10像素处画上图二
                            g1.DrawImage(img2, img1.Width, 0, img2.Width, img2.Height);
                            g1.Dispose();
                        }
                        img1.Dispose();
                        img2.Dispose();                        
                    }
                }
            }
            else
                bitMap = new Bitmap(MyImg)
                            if (FileSuffix == "png" || FileSuffix == "bmp" || FileSuffix == "jpg" || FileSuffix == "dds")
            {
                //Image img = new Bitmap(MyImg);
                if (Rb2png.IsChecked == true)
                {
                    if (Cum_Textbox.IsEnabled == true)
                    {
                        if (Img_Name.Substring(0, 1) == "0")
                            bitMap.Save(path + Cum_Textbox.Text + detect_time + ".png", myImageCodecInfo, myEncoderParameters);
                        else
                            bitMap.Save(path + Cum_Textbox.Text + detect_time + "_NOK.png", myImageCodecInfo, myEncoderParameters);
                    }
                    else
                    {
                        if (Img_Name.Substring(0, 1) == "0")
                            bitMap.Save(path + detect_time + ".png", myImageCodecInfo, myEncoderParameters);
                        else
                            bitMap.Save(path + detect_time + "_NOK.png", myImageCodecInfo, myEncoderParameters);
                    }
                }
                else if (Rb2jpg.IsChecked == true)
                {
                    if (Cum_Textbox.IsEnabled == true)
                    {
                        if (Img_Name.Substring(0, 1) == "0")
                            bitMap.Save(path + Cum_Textbox.Text + detect_time + ".jpg", myImageCodecInfo, myEncoderParameters);
                        else
                            bitMap.Save(path + Cum_Textbox.Text + detect_time + "_NOK.jpg", myImageCodecInfo, myEncoderParameters);
                    }
                    else
                    {
                        if (Img_Name.Substring(0, 1) == "0")
                            bitMap.Save(path + detect_time + ".jpg", myImageCodecInfo, myEncoderParameters);
                        else
                            bitMap.Save(path + detect_time + "_NOK.jpg", myImageCodecInfo, myEncoderParameters);
                    }
                }
                else if (Rb2BMP.IsChecked == true)
                {
                    if (Cum_Textbox.IsEnabled == true)
                    {
                        if (Img_Name.Substring(0, 1) == "0")
                            bitMap.Save(path + Cum_Textbox.Text + detect_time + ".bmp", myImageCodecInfo, myEncoderParameters);
                        else
                            bitMap.Save(path + Cum_Textbox.Text + detect_time + "_NOK.bmp", myImageCodecInfo, myEncoderParameters);
                    }
                    else
                    {
                        if (Img_Name.Substring(0, 1) == "0")
                            bitMap.Save(path + detect_time + ".bmp", myImageCodecInfo, myEncoderParameters);
                        else
                            bitMap.Save(path + detect_time + "_NOK.bmp", myImageCodecInfo, myEncoderParameters);
                    }
                }
            }
            else
            {
                MessageBox.Show("文件格式错误，请拖入图片文件（png，bmp，jpg）");
            }
            if (bitMap != null)
                bitMap.Dispose();      

            myEncoderParameter.Dispose();
            myEncoderParameters.Dispose();
            //GC.Collect();
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需要注意的是，在这段代码中，除了使用new新建的目标会在循环中出现内存泄漏之外，Graphics g1，Image img1，Image img2这几个新建的画图同样会在循环时造成内存泄漏，
现归纳三个方法防止泄漏：
一是每个目标使用完成后在末尾添加.Dospose()
二是在所有目标使用完成后，在结尾添加GC.Collect()
三是在创建目标时使用using，以使其在使用完成后自动释放