Ask a user to install a Chrome extension given an extensionID from C#

gistfile1.cs

var chromeAppDataPath = Path.Combine(Environment.GetEnvironmentVariable("localappdata"), @"Google\Chrome");
var chromeExtensionId = "clopmcfjibhgfnagfneonflajbjidfai";
if (Directory.Exists(chromeAppDataPath))
{                
    var extensionsPath = Path.Combine(chromeAppDataPath, @"User Data\Default\Extensions\" + chromeExtensionId);
    if (!Directory.Exists(extensionsPath))
    {
        Process.Start(new ProcessStartInfo()
        {
            FileName = Path.Combine(chromeAppDataPath, @"Application\chrome.exe"),
            Arguments = " --install-from-webstore=" + chromeExtensionId
        });
    }
}

Thank you Justin. webstore install.
i need Developer source directory install

%userdata%..\extension_dir\my_project --install