This post is about how to crate a list item in SharePoint list in backend process. It can be API, background service, azure function, mobile or desktop app. So, it can be anything you want, but in .Net. And we will use SharePoint Rest API, that is wrapped by CSOM (Microsoft.SharePointOnline.CSOM).

Today I lost way too much time trying to understand why I couldn’t see data in a PostgreSQL database running inside a Docker container. I was connected via DBeaver, everything looked fine:

• connection successful
• schemas visible
• but no tables

At my previous job I was happy to work with SharePoint on-premises. More than 10 years with SP 2007, 2010 and finally 2019. Almost 3 years ago I thought I won't cooperate with it. In May 2026 the support of SharePoint server ends. But as it turned out many companies still use SP on-prem and don't want to migrate.

In this example here will be the mixed scenario. The parent component has states, and the child component. It's the mixed implementation. Of course, usually you make everything in the same style, but there are situations, when you need the mixed implementation.

The app that I am developing now connects to Azure services and DefaultCredential were used for that. In Azure the authentication between services works with managed identities and I am satisfied with them, but while the development I've got an error "Azure.RequestFailedException: Server failed to authenticate the request", so I really didn't know what to do. Yesterday it worked, today not.

Determining the first and last days of a quarter is a common task for accounting applications and reporting. For web applications, I have been using Day.js (https://day.js.org/) for a long time instead of the well-known moment. There is an extension for Day.js that allows you to determine the first and last days of a quarter.

When you are developing a workflow for multiple users and roles, at least sometimes you must check your app with different accounts. When you use Chrome or Edge, it's not obvious how to switch account in SharePoint on-premises. When you click a button 'Sign out', it automatically logs in with you active account.

How to manage Wi-Fi cionnections from the command line? I like to do lots of things with it. With the command 'netsh wlan show profiles' you can get the list of all the known wifi-connections. You need these values to operate with them further.

My daughter has been using her 14'' HP laptop since 2019. During this time there were 3 problems with PC - RAM (DDR 4), Wi-Fi and noise.

Here’s an example of a pipeline sequence in PowerShell — a simple but powerful concept.
Imagine you forgot to clean up your old log files. Or, as I had to do today, you open the dreaded folder 'inetpub/mailroot/Badmail' on a dev server and see thousands of files.