How to Connect SQLSERVER database through C#

C# code:

SqlConnection cn = new SqlConnection(ConfigurationManager.ConnectionStrings["sqlcon"].ToString());

        cn.Open();


web.config:



<connectionStrings>

  <add name="sqlcon" connectionString="Data Source=MALLISBOOK\SQLSERVER2012;Initial Catalog=dbprogrames;Integrated Security=True;User id=sa;Password=123;" providerName="System.Data.SqlClient" />

  <!---->

</connectionStrings>

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