public string ApplicationName {get; set;}

'Declaration
 
Public Property ApplicationName As String

Property Value

Can be any string of less than 64 characters (in a standard PostgreSQL build). Should include only printable ASCII characters; any other characters will be replaced with question marks (?).The application name will be displayed in the pg_stat_activity view and may be included in the server log entries.

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

PgSqlConnectionStringBuilder Class
PgSqlConnectionStringBuilder Members