Update command using Npgsql postgres and C#

Question

I have created a search form to locate a record based on a search value called license ID. I am able to pull the all the fields for that value. My question is I am trying to

Answer 1

You only need "set" once per command.

NpgsqlCommand cmd = new NpgsqlCommand("update info set \"Fname\" = :FirstName, \"Lname\" = :LastName, \"Address\" = :Address," +
                "\"City\" = :City, \"State\" = State, \"Zip\" = :Zip," + 
                "\"PhoneNumber\" = :PhoneNumber where \"LicenceNumber\" = '" + LicenseID + "' ;", conn);