How to Avoid Common Security Mistakes in .NET

A guide on avoiding Common Security pitfalls in simple words

Alex Maher


Hey there! Let’s talk about keeping your .NET apps safe from those online bullies trying to mess with your stuff. You don’t need to be a tech wizard to follow along. I’ll keep it simple, promise.

Stay Updated

First things first, always make sure your .NET and any other software you’re using are up to date. It’s like making sure your phone’s operating system is current so you get all the latest features and security fixes.

This helps block out the bad guys looking for old flaws to exploit.

Check Inputs

When your app asks for information, don’t just take it at face value. Check it over. If you’re asking for an email, make sure it looks like an email. This helps keep out harmful stuff that could mess with your app.

Be Careful Who You Let In

Not everyone should get to see everything in your app.

Just like you wouldn’t give your house keys to just anyone, don’t let just any user access sensitive parts of your app. Set up some checks to make sure only the right people can see the right things.

Secure Conversations

When your app talks to a user or another app, it should do so securely.

Use HTTPS, which is just a secure way of sending data back and forth. It’s like sealing your letters in an envelope instead of sending postcards.

Keep Secrets Safe

Your app probably needs to remember important things like passwords or secret keys. Don’t just leave these lying around in your code.

Use tools that are made for storing secrets.

Be Vague About Errors

When something goes wrong, don’t spill the beans about what happened.

If your app encounters an error, just say “something went wrong” instead of giving away details. This way, you’re not giving hints to anyone looking to cause trouble.

Guard Against Tricks



Alex Maher

.NET C# dev with 10+ yrs exp, self-taught & passionate web developer. Sharing tips & experiences in C# and web dev.