C#中判断某软件是否已安装

private void button1_Click(object sender, EventArgs e)  

{  

    if (checkAdobeReader() == true)  

    {  

        MessageBox.Show("有安裝 Adobe Reader ");  

    }  

    else 

    {  

        MessageBox.Show("沒有安裝 Adobe Reader ");  

    }  

}  

///

  

/// 確認是否有安裝 Adobe Reader   

///

  

/// true: 有安裝, false:沒有安裝  

private bool checkAdobeReader()  

{  

    Microsoft.Win32.RegistryKey uninstallNode = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(@"SOFTWAREMicrosoftWindowsCurrentVersionUninstall");  

    foreach (string subKeyName in uninstallNode.GetSubKeyNames())  

    {  

        Microsoft.Win32.RegistryKey subKey = uninstallNode.OpenSubKey(subKeyName);  

        object displayName = subKey.GetValue("DisplayName");  

        if (displayName != null)  

        {  

            if (displayName.ToString().Contains("Adobe Reader"))  

            {  

                return true;  

                // MessageBox.Show(displayName.ToString());  

            }  

        }  

    }  

    return false;  

}