Question

In SQL we open connection

 conn.Open();
 cmd.ExecuteNonQuery();
 conn.Close();

or

 using (conn = new SqlConnection(connectionString))
 {
     cmd1.Connection = conn;
     conn.Open();
     cmd1.ExecuteNonQuery();
 }

What is best practice for LINQ to SQL:

 DataClassesLinqDataContext dbLinq = new DataClassesLinqDataContext();

or

 using(DataClassesLinqDataContext dbLinq = new DataClassesLinqDataContext())
 {
      var x = ...
 }

Answer 1

Yes, best practise is to dispose of the context to free up the resources it holds so I’d go with the using ()