I find myself switching between C# and JavaScript quite a lot. Even though I've been doing that for years, there are still occassions where I get caught out by a language feature.

Here I go through a few of the key differences which have caught me out in the hope that writing about them stops it happening in the future.

If only things were that simple!

I accidentally typed out a couple of .NET LINQ statements while writing JavaScript and drew a blank on the equivalent method names.

In the hope of not forgetting again, here I dig into the equivalent of the .NET LINQ Select method in JavaScript. They're not identical, but I think for most people the differences won't matter.

I started working on a old side-project that was using an out-of-date version of IdentityServer (2.0.0). Rather than jump two major versions, I decided to go slowly, use this as a learning exercise, and go to the highest major version I could find (2.5.4).

Unfortunately the online docs didn't have 2.5.4, so I decided to build them myself. As always, I didn't want to install a lot of stuff that would be used just once. Another perfect scenario for docker.

Although I've been using MongoDB for a while, I realised I'd never started a greenfield project. Not wanting to install yet more software on my laptop, I realised this was a perfect fit for Docker.

Here's a quick start guide to getting C# .NET Core querying a MongoDB docker instance I used to get up and running.