C# show 2 FILESTREAM table images to Update

Question

them
Colleagues, let's see if they guide me, with a theme of showing the images in my forms (csharp) and then editing them.
Detail.
 I have 2 fields of Varbinary types created with FILESTREAM SQL.
 The FILESTREAM Data is represented in a table called ParIMG and that links to the Participants table, in each insert it adds the data to the 2 tables mentioned.
 Currently I list the data of these 2 tables in my Datagridview.
 Client Server Architecture (I have a server with a DB)
 My ParIMG type table has 4 fields (ID, Photo, DniIMG, DniNum)
Additional
Previously I used to insert the images in the DB, but now as my DB is growing I have decided to use FILESTREAM which saves my IMG in a folder and the Path in the DB.
Looking for info
I have been looking for information in relation to the topic in which it mentions that I have to convert the Varbinary to Byte etc.
Thank you in advance for your unconditional support.