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Background Recently, we had requirement wherein a process should, Periodically (Poll) or Asynchronously (Pub-sub) listen on incoming requests/messages. The whole process is expected to be long running. Should also implement clean disposal of in-flight requests and subsequent cleanup using something similar to Cancelble Context in Go The first of the objective is somewhat dependent on mechanism (Pub/sub, Listener), protocol (TCP, HTTP etc.). For the second one, .NET framework (and .NET Core) offers CancellationToken. It is maint for co-operative cancellation between threads and Task Objects. So Armed with this, is it possible to come up with a template that allows cancellation of long running task while also being deployed as Windows Service (or using systemd in Linux) ? ...

Background Oftentimes, we come across situation where code does not perform as per expectation. What is typically approch to address it, Performance Testing - Visual Studio Load Tests or Third party tools like Locust, Vegeta, Gatling etc. Visual Studio Diagnostics Tools Or Use tools like Perfview/dotTrace/dotMemory to diagnose bottlenecks What if it is possible to Benchmark code for, Set of varying parameter(s) Different runtimes (.NET Framework versions, .NET core, Mono etc.) with option to Benchmark it Observe Memory Allocations for diagnostics Get Detailed report on execution timeline Have it as part of test suite so that it can be easily executed with every iteration involving optimized code to get immediate feedback Enter BenchmarkDotNet, a Powerful .NET library for benchmarking. It is used by DotNET Team, Roslyn, ASP.NET Core and many other projects. ...

Background A Web Application, developed in ASP.NET Core (Runtime Version 3.1.100) using Razor Pages and Web API, is expected to be launched from within third-party Web Application in iframe, with complete HTML being rendered. During the Development, a mock HTML Page was developed to simulate launching of ASP.NET core based Web Application in iframe. Note that this page as well as Application was hosted on same IIS Server and it worked fine. Subsequently, Web Application was deployed on Test Server and URL was shared for integration with third party Application and then it happened Boom…. i.e. Application when launched in iframe rendered HTML but none of the post request would work (returning HTTP Error 400). Careful inspection showed that, ...

Background Recently, i got involved in assignment where in an application was facing issues with throughput. Expectation is to support more than 500 transactions per second while load testing results were indicating system was experiencing high latency beyond 100+ transactions per second. This application is developed in .NET Framework + .NET Core and primarily uses Relational Database for persistence and has point to point integration (mainly over HTTP) with internal & external application(s). ...

Background One of the key project(s) at my current organization is developed on .NET 4.6.1. It is developed as Modular Monolith. As part of it’s functionality, it supports different channels like Mobiles, Terminals and Web. For the Web channel, there was need to develop a Web application with, High availability Lightweight, High throughput (Need to support few thousand(s) active users) Accordingly, we have been exploring developing this Web Application in .NET core 3.1. However, it also means that we will have to use class libraries, targeted at .NET framework 4.6.1, in .NET core and vice-versa. How can this be done? ...