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  1. //Conectarse a una base de datos con C#
  2. using System;
  3. using System.Collections.Generic;
  4. using System.Linq;
  5. using System.Text;
  6. using System.Data.SqlClient;
  7. using System.Configuration;
  8.  
  9. namespace cnsConnectionDataBase
  10. {
  11.     class Program
  12.     {
  13.         static void Main(string[] args)
  14.         {
  15.             string conexionString =
  16.                  ConfigurationManager.ConnectionStrings["ConexionPruebas"].ConnectionString;
  17.             using (SqlConnection conn = new SqlConnection(conexionString))
  18.             {
  19.                 conn.Open();
  20.                 Console.WriteLine("DataSource: {0}", conn.DataSource);
  21.                 Console.ReadKey();
  22.             };          
  23.         }
  24.     }
  25. }
');