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

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.");


         Console.WriteLine("Number of Employees is {0}", cmd.ExecuteScalar());
      catch (SqlException ex)
         Console.WriteLine("Connection Closed.");
Command created and connected.
Number of Employees is 4
Connection Closed.

32.18.1.Create a SqlCommand
32.18.2.Create SqlCommand with both sql query and connection
32.18.3.SqlCommand: AutoClose
32.18.4.Execute two sql commands
32.18.5.Asynchronous Processing Sql command
32.18.6.Start process of retrieving a data reader asynchronously, check the IsCompleted property value.
32.18.7.SqlCommand with Callback Handler
32.18.8.Add parameters to the SqlCommand
32.18.9.SQL StoredProcedure
32.18.10.Execute Scalar with SqlCommand
32.18.11.Execute the scalar SQL statement and store results
32.18.12.Executing a Parameterized Query with SqlCommand
32.18.13.Batch Update Demo
32.18.14.Execute update statement with SqlCommand against MDF file
32.18.15.Executing a Query That Returns a Single Value
32.18.16.Async Command Object Demo