I am working on the Windows Desktop Application. Of Course, Now is 2025. I am building a new Windows application, and I think that WinUI is one of the best options I can think of.
However, WinUI is a kind of platform-independent, if you still need to access the local function such as the File Dialog, You still use to have Interpo.
var picker = new FileOpenPicker();
picker.FileTypeFilter.Add(".json");
picker.SuggestedStartLocation = PickerLocationId.DocumentsLibrary;

var hwnd = WinRT.Interop.WindowNative.GetWindowHandle(this);
WinRT.Interop.InitializeWithWindow.Initialize(picker, hwnd);
Here is the example

Last Month, I went to the Brisbane.net user group. The topic is PostgreSQL.PostgreSQL? How can it be related to .Net? You may think that that is more related to Linux. That is not. Azure got Postsqesql implementation, which is customized for Azure. Thus, that is performance quite good.
Moreover, that is more than half the price of the MS SQL server option. Lastly, EF core is fully supported by Postgresql. They are very suitable for a small-scale project. I will explore it for my membership management system.

Due to the discontinuation of Google Podcasts, I am writing my own Podcast App for Android. I chose C# MAUI because I am a C# Developer, and I have used Xamarin (become a part of MAUI now) for years.
My first problem is the Podcast App; I need to load the RSS (XML) via HTTP. That is so easy. Same as other C# programs. Also, you can use to load any JSON information in different use case

Code

For using the PieChart, that is very easy, you just need to bind the series collection

Then I just need to get the data from my repo:

            var categories = new ObservableCollection(_database.BudgetCategories.GetAllCategories());

            SeriesCollection = new SeriesCollection();
            foreach (var category in categories)
            {
                var budgetItems = new ObservableCollection(_database.BudgetItems.GetItemByCategory(category));
                double amount = 0;
                foreach (var item in budgetItems)
                {
                    amount += (double) item.Amount;
                }
                var pieSeries = new PieSeries
                {
                    Title = category.Name,
                    Values = new ChartValues { new ObservableValue(amount) },
                    DataLabels = true
                };
                SeriesCollection.Add(pieSeries);
            }
         
        }  

Recently, we have been buying a WPF application. That is a budget management application. That is talking about money. Of course, charts need to play an important role. I have looked into various charting libraries. Some of them need to be paid. However, one is entirely open and completed under an MIT license. That does not require access to their AP. Charting is done locally. It supports everything, such as MAUI, Wpf, Winforms, and ASP.net. In addition, the documentation is alright. That is Live Charts.