PRA says:

Hi! I have table for saving document with name.  Usually  using tajik fonts (қҳҷғӣӯ) for name document. But have problem when I insert tajik font into table it’s show sign(????) instead tajik font.  For example:

Id	NameDoc
1	Ҳуҷҷати тоҷикӣ
2	Қарорҳо

Select id, NameDoc from DocTable

Output result:

Id	NameDoc
1	Ҳуҷҷати тоҷикӣ
2	Қарорҳо

Hi PRA,

I think you need to use NVARCHAR data type for column name NameDoc  to store the various languages text characters.

Refer below link for your reference .

Insert Hindi, Marathi, Gujarati, Urdu, Persian, Arabic, Tamil and Telugu languages Text characters in SQL Server using C# and VB.Net