How to output query result to file via C#?

Question

SQL

SqlCommand command = new SqlCommand("SELECT Id,Name,Price FROM [Products] WHERE [Id][email protected] ", sqlConnection);

while (await sqlReader.ReadAsync())
                    {
                        listBox3.Items.Add(Convert.ToString(sqlReader["id"]) + "  " + Convert.ToString(sqlReader["Name"]) + "  " + (1 + ((readSearch1 - f) * 1.2) / f)/*Convert.ToString( met(readSearch1))*/);
                       
                    }

Answer 1

"writing text to a file in c#" - www.java2s.com/Tutorials/CSharp/System.IO/File/C_F... ?