Check Registry to see if it is installed

        

using System;
using Microsoft.Win32;

class Utility
{
    public static bool IsInstalled(string uninstallProductName, string targetMachine)
    {
        RegistryKey regKey = RegistryKey.OpenRemoteBaseKey(RegistryHive.LocalMachine, targetMachine);
        RegistryKey tempKey;

        uninstallProductName = uninstallProductName.Trim().ToLower();

        regKey = regKey.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall", false);

        foreach (string subKey in regKey.GetSubKeyNames())
        {
            tempKey = regKey.OpenSubKey(subKey, false);

            if (Array.IndexOf(tempKey.GetValueNames(), "DisplayName") >= 0)
            {
                if (tempKey.GetValue("DisplayName").ToString().ToLower()
                    .StartsWith(uninstallProductName))
                {
                    return true;
                }
            }
        }

        // no match
        return false;
    }
}

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Check Registry to see if it is installed : Registry « Development Class « C# / C Sharp

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