title: connection string to a SQL Server cluster
body: <p>Could anyone point me or tell me how to write connection string to a SQL Server cluster instance? </p>
  
  <p>I want to establish trusted connection to a database (initial catalog) of the specific instance of a SQL Server cluster. I find for quite some time but can not find official answer from Google.</p>
  
  <p>I am asking for the connection string for C# ADO.Net code.</p>
  
  <p>I know how to write connection string to a normal one-machine non-cluster SQL Server instance.</p>