String.Format changes to EU format when deployed to IIS

So I have a solution that I'm about to deploy to IIS. Currently, everything works fine in my debug environment, and my String.Format() for dollars is correct i.e.:

string.Format("{0:#,0.00}", myMoney)
//Outputs 100,00.00

However, when deployed to IIS things change slightly, here my strings with currency shows in an european format, i.e. 100.00,00...

I have tried a bunch of things thus far, without any luck, let me recap here:

Changed globalization in IIS from invariant to en_US in both Culture and UICulture
Changed region of the server to be US
Changed region of the client to be US

I'm running windows server 2019 with IIS 10.0.017763.1

Still, I'm stuck with the same problem. What have I missed?

Solution

Will other overloading method string.Format(cultureInfo,format,args) an option? In this case you can specify your desired culture.