Npgsql2 failed to establish connection in mono-soft debugging

Question

Npgsql2 failed to establish connection in mono-soft debugging

I have a simple application in C #:

NpgsqlConnection conn = new NpgsqlConnection("Server=127.0.0.1;Port=5432;User Id=joedata;Password=joedata;Database=joedata;"); conn.Open(); conn.Close();

What causes a debug exception on conn.Open () with this information:

 Npgsql.NpgsqlException: Failed to establish a connection to '127.0.0.1'. ---> System.Exception: Failed to establish a connection to '127.0.0.1'. at Npgsql.NpgsqlClosedState.Open (Npgsql.NpgsqlConnector context) [0x00101] in /Users/fxjr/Desenvolvimento/ProjetosOpenSource/Npgsql/NpgsqlSourceRelease/Npgsql2/src/Npgsql/NpgsqlClosedState.cs:171 --- End of inner exception stack trace --- at Npgsql.NpgsqlClosedState.Open (Npgsql.NpgsqlConnector context) [0x00264] in /Users/fxjr/Desenvolvimento/ProjetosOpenSource/Npgsql/NpgsqlSourceRelease/Npgsql2/src/Npgsql/NpgsqlClosedState.cs:232 at Npgsql.NpgsqlConnector.Open () [0x00039] in /Users/fxjr/Desenvolvimento/ProjetosOpenSource/Npgsql/NpgsqlSourceRelease/Npgsql2/src/Npgsql/NpgsqlConnector.cs:685 at Npgsql.NpgsqlConnectorPool.GetPooledConnector (Npgsql.NpgsqlConnection Connection) [0x00169] in /Users/fxjr/Desenvolvimento/ProjetosOpenSource/Npgsql/NpgsqlSourceRelease/Npgsql2/src/Npgsql/NpgsqlConnectorPool.cs:434