Database Collation

Dear user,
I have alot databases, i would like to change the  Database Collation for one database how can we do that i don't want to change the  Database Collation for whole server. Do you have any Microsoft guideline about it. I am not able to find on Microsoft website. 

For changing collation of specific database, you may consult with Microsoft document :
https://docs.microsoft.com/en-us/sql/relational-databases/collations/set-or-change-the-database-collation?view=sql-server-2017
 
I hope this shall help you.