Create SqlCommand with both sql query and connection : SqlCommand « ADO.Net « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. ADO.Net
3. SqlCommand

using System;
using System.Data;
using System.Data.SqlClient;

class CommandScalar
{
   static void Main()
   {
      SqlConnection conn = new SqlConnection("server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI;");

      string sql = @"select count(*) from employee";

      SqlCommand cmd = new SqlCommand(sql, conn);
      Console.WriteLine("Command created and connected.");

      try
      {
         conn.Open();

         Console.WriteLine("Number of Employees is {0}", cmd.ExecuteScalar());
      }
      catch (SqlException ex)
      {
         Console.WriteLine(ex.ToString());
      }
      finally
      {
         conn.Close();
         Console.WriteLine("Connection Closed.");
      }
   }
}

Command created and connected.
Number of Employees is 4
Connection Closed.