C# and sql

Question

I need a mobile app to learn c# and sql ( l am learning .NET Develop) , thanks all

Answer 1

SoloLearn
Programming Hub
Learn C#
SQL Practice Pro
C# Programming by SoloLearn
Learn SQL
DotNet Tutorials
Udemy

Answer 2

this question is not clear.

c# shell (c# offline complier)
acode, spck editor, droidedit, ....