How do I make my C# application stop showing question mark

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I start to make a project using c# language
and it's done
now i want to test it on another pc runnig windows 10
but it show's perisian letter az '?'
and it save the data to data base again with '?'
how to fix this?
please help me

What I have tried:

create table and data base in utf 8

Posted 10-Jul-17 3:03am

Member 12982342

Updated 10-Jul-17 4:21am

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Joezer BH 10-Jul-17 9:27am

Do you have the languase support on your Windows10?

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RickZeeland · Answer 1 · 2017-07-10T04:21:00

Make sure you use NVARCHAR() instead of VARCHAR() (I assume your are using SQL Server), this is necessary for storing Unicode characters.
Internally C# always uses Unicode, 2 bytes for every character, unless you specify otherwise with Encoding, see: Encoding Class (System.Text)[^]
Also see CultureInfo.CurrentCulture: CultureInfo.CurrentCulture Property (System.Globalization)[^]