Cannot implicitly convert type 'byte[]' to 'string'

Question

I want to upload an image in the database using the following method: 

public void upload(byte[] pic, string name)
        {
            using (DataClasses1DataContext context = new DataClasses1DataContext())
            {
                var result = (from usr in context.Tables
                              where usr.name == name
                              select usr).Single();
                result.photo = pic;
                context.SubmitChanges();
            }             
        }

But I'm getting an error: "Cannot implicitly convert type 'byte[]' to 'string'".
The field "photo" in the database table "Tables" has varchar(MAX) type, I also tried Image and varbinary(MAX) types. 
How can I make this work?