Do I have to capitalize the first letter of Write and Line? also, is English your foreign language ?

Answer 1

yes, you have to capitalize both write and line:
Console. WriteLine(...)

Answer 2

Yes. Because that's the provided code.

C# codes are called, CASE-SENSITIVE codes; any mistake from Capitalizing and Not Capitalizing letters may produce Errors.

Answer 3

yes you have to capitilize them. but if you use visual studio, it does that itself.