Get installed application list in windows OS using C#.Net

Find installed application in my PC using C#.Net

Some time we need to know before installing our new setup file it’s already installed or not in the computer. In the below examples I have explained how to get list of application installed in the system (OS) using C#.Net 2.0. The Example 1 will give you more quick result compare then Example 2.

  private void Form1_Load(object sender, EventArgs e)

        {

            CheckInstalledApplication();

            LoadSoftwareList();

        }

In the Example1 explained get the registory access and display the list of installed application in the windows system.

Example 1:

//Check the list of application installed in the OS

        private bool CheckInstalledApplication()

        {

            string SoftwareKey = @"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall";

            string strDispName;

            List<string> lsRegistory = new List<string>();

            using (RegistryKey rkRegistryKeyOne = Registry.LocalMachine.OpenSubKey(SoftwareKey))

            {

                foreach (object varName in rkRegistryKeyOne.GetSubKeyNames())

                {

                    using (RegistryKey rkRegistryKeyTwo = rkRegistryKeyOne.OpenSubKey(varName.ToString()))

                    {

                        strDispName = Convert.ToString(rkRegistryKeyTwo.GetValue("DisplayName"));

                        if (!string.IsNullOrEmpty(strDispName))

                        {

                            lsRegistory.Add(strDispName + " ---> " + Convert.ToString(rkRegistryKeyTwo.GetValue("DisplayVersion")));

                        }

                    }

                }

            }           

            lsRegistory.Sort();           

            listBox1.DataSource = lsRegistory.ToArray();

            return true;            

        }

In the Example2 explained using management object get the win32 product list from the windows OS.

Example 2:

using System.Management;

        private void LoadSoftwareList()

        {

            listBox1.Items.Clear();

            ManagementObjectCollection moReturn;

            ManagementObjectSearcher moSearch;

            moSearch = new ManagementObjectSearcher("Select * from Win32_Product");

            moReturn = moSearch.Get();

            foreach (ManagementObject mo in moReturn)

            {

                listBox1.Items.Add(mo["Name"].ToString());

            }

        } 

Note: Thanks to Antony