C# calls the browser to open the URL

 public void OpenBrowser()
         {
             string url = "http://localhost:8055/api";
             bool openRes = OpenBrowserHelper. OpenChromeBrowserUrl(url);

             if (!openRes)
                 openRes = OpenBrowserHelper. OpenDefaultBrowserUrl(url);

             if (!openRes)
             {
                 // Open the download link, download from the official website Google
                 if (MessageBox.Show("Google (Chrome) browser is not installed in the system, do you want to download and install it?", null, MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question) == DialogResult.Yes)
                 {
                     OpenBrowserHelper.OpenIe("https://www.google.cn/chrome/");
                 }
             }
         }

public class OpenBrowserHelper
     {
         /// 

         /// Call Google (Chrome) browser
         /// 
         /// Open the link of the web page
         public static bool OpenChromeBrowserUrl(string url)
         {
             bool isOpen = true;
             try
             {
                 // Open Google Chrome with Google, if not found, use the default browser of the system
                 // Google has been uninstalled, the registry has not been cleared, the program will return a "The system cannot find the specified file." bug
                 var chromeKey = @"\Software\Microsoft\Windows\CurrentVersion\App Paths\chrome.exe";
                 // Find the Google Chrome installation path through the registry
                 string chromeAppFileName = (string)(Registry. GetValue("HKEY_LOCAL_MACHINE" + chromeKey, "", null) ?? Registry. GetValue("HKEY_CURRENT_USER" + chromeKey, "", null));
                 // Find Google Chrome and open it
                 if (!string.IsNullOrWhiteSpace(chromeAppFileName))
                 {
                     Process.Start(chromeAppFileName, url);
                 }
                 else
                 {
                     isOpen = false;
                     // open by default browser
                    //OpenDefaultBrowserUrl(url);
                 }
             }
             catch
             {
                 isOpen = false;
             }

             return isOpen;
         }

         /// 

         /// Call IE browser
         /// 
         /// 
         public static void OpenIe(string url)
         {
             // IE browser path installation: C:\Program Files\Internet Explorer
             // at System.Diagnostics.process.StartWithshellExecuteEx(ProcessStartInfo startInfo) notice this error
             try
             {
                 if (File. Exists(@"C:\Program Files\Internet Explorer\iexplore.exe"))
                 {
                     ProcessStartInfo processStartInfo = new ProcessStartInfo
                     {
                         FileName = @"C:\Program Files\Internet Explorer\iexplore.exe",
                         Arguments = url,
                         UseShellExecute = false,
                         CreateNoWindow = true
                     };
                     Process.Start(processStartInfo);
                 }
                 else
                 {
                     if (File. Exists(@"C:\Program Files (x86)\Internet Explorer\iexplore.exe"))
                     {
                         ProcessStartInfo processStartInfo = new ProcessStartInfo
                         {
                             FileName = @"C:\Program Files (x86)\Internet Explorer\iexplore.exe",
                             Arguments = url,
                             UseShellExecute = false,
                             CreateNoWindow = true
                         };
                         Process.Start(processStartInfo);
                     }
                 }
             }
             catch (Exception exception)
             {
             }
         }

         /// 

         /// Call the system's default browser (the user has set the default browser himself)
         /// 
         /// 
         public static bool OpenDefaultBrowserUrl(string url)
         {
             bool isOpen = true;
             try
             {
                 //Read the default browser executable file path from the registry
                 RegistryKey key = Registry.ClassesRoot.OpenSubKey(@"http\shell\open\command\");
                 if (key != null)
                 {
                     string browserPath = string. Empty;
                     string[] splitArr = new string[] { };
                     string browser = key. GetValue(""). ToString();

                     //browser is the default browser, the parameters behind different browsers"It's not the same.  For example: "D:\Program Files (x86)\Google\chrome.exe" -- "%1"
                     var lastIndex = browser.IndexOf(".exe", StringComparison.Ordinal);
                     if (lastIndex == -1)
                         lastIndex = browser.IndexOf(".EXE", StringComparison.Ordinal);

                     if (lastIndex != -1)
                     {
                         splitArr = browser.Split("\"");
                     }
                     // Greater than 0, it means cut to data according to "
                     if (splitArr. Length > 0)
                     {
                         browserPath = splitArr[1];
                     }
                     else if (splitArr.Length == 0 && lastIndex != -1) //Indicates that there is a browser, such as: D:\QQBrowser\QQBrowser.exe
                     {
                         browserPath = browser;
                     }
                     // open the browser
                     var result = Process. Start(browserPath, url);

                     // call IE
                     //if (result == null)
                     // OpenIe(url);
                 }
                 else
                 {
                     isOpen = false;
                    //OpenIe(url);
                 }
                    
             }
             catch
             {
                 isOpen = false;
             }
             return isOpen;
         }
     }