Detecting Microsoft patch updates

Question

Hi All,

I am looking for detecting Microsoft patch updates programmatically using C#.

The idea is to know the patch update time on the windows machines.

Any help is much appreciated.

Regards,

Pradeep Pasam

Answer 1

Hi @Pasam Pradeep Sabarinadh , Welcome to Microsoft Q&A,

Windows Update API (Windows Update Agent API) provides more detailed patch information (such as KB number, installation status, time, etc.)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace xxx
{
    class Program
    {
        static void Main(string[] args)
        {
            Type updateSessionType = Type.GetTypeFromProgID("Microsoft.Update.Session");
        dynamic updateSession = Activator.CreateInstance(updateSessionType);
        dynamic updateSearcher = updateSession.CreateUpdateSearcher();

        try
        {
            dynamic searchResult = updateSearcher.Search("IsInstalled=1");
            foreach (var update in searchResult.Updates)
            {
                Console.WriteLine($"Title: {update.Title}");
                Console.WriteLine($"KB Article: {update.KBArticleIDs[0]}");
                Console.WriteLine($"Installed Date: {update.LastDeploymentChangeTime}");
                Console.WriteLine(new string('-', 50));
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine("Error retrieving Windows updates: " + ex.Message);
        }
        }
    }
}

Best Regards,

Jiale

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