Transactions – Buy Bitcoin with NBitcoin C# web app

I created a Bitcoin wallet app using NBitcoin lib with C#. I’ve pretty much got the wallet creation and everything that comes with it sorted out. What I need help with is how to buy Bitcoin to fill my wallet on the MAIN (real) network. Does this also happen through libraries in C#? Is this possible using the NBitcoin package?

There is a lot of documentation about setting up a wallet, finding a wallet, and making transactions, but there is very little information about how to fund a Bitcoin wallet. For example, Luno allows you to purchase Bitcoin using your credit/debit card and that Bitcoin value is available in your Bitcoin wallet within the Luno app. This is similar to what I’m trying to achieve. Any guidance on this would be greatly appreciated. I also don’t expect easy answers and am willing to work on this, but some information would be really welcome.