With "Mini C# Pro" you can write and compile C# code on your Android device.

It has the following features

- works off-line

- automatic code indentation

- syntax highlighting

- in case of an error it gives most of the the time clear debug-information

- various code examples

As all paid apps in the Play Store there is a 15 minute window to try out the app for free. In these 15 minutes you can cancel your purchase and reclaim your money.