See C# Support Temporarily Removed in Studio 19.10
You are still somewhat able to use C# in/for UiPath:
- Creating custom activities using C#: https://docs.uipath.com/activities/docs/creating-a-custom-activity
- Using the “Invoke Code Activity” and setting the Language parameter to “CSharp”
There are most likely some more options to use C# in our projects. These are the ones I am aware of.