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 ");
}
}
/// <summary>
/// 確認是否有安裝 Adobe Reader
/// </summary>
/// <returns>true: 有安裝, false:沒有安裝</returns>
private bool checkAdobeReader()
{
Microsoft.Win32.RegistryKey uninstallNode = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall");
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;
}