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SqlCommand ExecuteScalar()

using System; using System.Data; using System.Data.SqlClient; class ExecuteScalar {   public static void Main()   {     SqlConnection mySqlConnection =new SqlConnection("server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI;");     SqlCommand mySqlCommand = mySqlConnection.CreateCommand();     mySqlCommand.CommandText ="SELECT COUNT(*) FROM Employee";     mySqlConnection.Open();     int returnValue = (int) mySqlCommand.ExecuteScalar();     Console.WriteLine("mySqlCommand.ExecuteScalar() = " + returnValue);     mySqlConnection.Close();   } }