c# sql column name

Hi,

 

I hope someone can help me.

 

I working on a visual studio project. I would like add a new column to my existing sql table (tbl_names). The column name is a string (newCol).

 

I tried two different ways: 

 

con.Open();

SqlCommand inc = new SqlCommand("ALTER TABLE tbl_names ADD " + newCol + " varchar(3)", con);

inc.ExecuteNonQuery();

con.Close();

con.Open();

var incString = string.Format("ALTER TABLE tbl_names ADD " + newCol + " varchar(3)");

SqlCommand inc = new SqlCommand(incString, con);

con.Close();