[Mono-list] Npgsql.NpgsqlClosedState.Open An exception was thrown by the type initializer for System.Net.Dns

[Andrus]

npgsqlConnection1.Open()  causes error

An exception was thrown by the type initializer for System.Net.Dns

Stack trace:
at Npgsql.NpgsqlClosedState.Open (Npgsql.NpgsqlConnector context) [0x00000]
  at Npgsql.NpgsqlConnector.Open () [0x00000]
  at Npgsql.NpgsqlConnectorPool.GetPooledConnector (Npgsql.NpgsqlConnection
Connection) [0x00000]

Stack trace from exception object is incomplete. I have no idea why.
How to fix this ?
I filed also a bug about this containing code to reproduce 
http://bugzilla.ximian.com/createattachment.cgi?id=79726

Andrus.

Code which causes error:

    class DataGrid : System.Windows.Forms.DataGrid
    {
        private Npgsql.NpgsqlConnection npgsqlConnection1;
        private Npgsql.NpgsqlCommand npgsqlCommand1;
        private Npgsql.NpgsqlDataAdapter npgsqlDataAdapter1;
        private System.Data.DataSet dataSet1;

        public DataGrid() {
            InitializeComponent();
            CreateLayout();
        }

        void CreateLayout() {
            // this line causes error:
            npgsqlConnection1.Open();
            npgsqlCommand1.CommandText = "select * FROM myschema.mytable
order by 1";
            npgsqlDataAdapter1.MissingSchemaAction =
System.Data.MissingSchemaAction.AddWithKey;
            npgsqlDataAdapter1.Fill(dataSet1);
            DataSource = dataSet1.Tables[0];
            }

        private void InitializeComponent()
        {
            this.npgsqlCommand1 = new Npgsql.NpgsqlCommand();
            this.npgsqlConnection1 = new Npgsql.NpgsqlConnection();
            this.npgsqlDataAdapter1 = new Npgsql.NpgsqlDataAdapter();
            this.dataSet1 = new System.Data.DataSet();
            ((System.ComponentModel.ISupportInitialize)(this.dataSet1)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this)).BeginInit();
            this.SuspendLayout();
            //
            // npgsqlCommand1
            //
            this.npgsqlCommand1.Connection = this.npgsqlConnection1;
            //
            // npgsqlConnection1
            //
            this.npgsqlConnection1.ConnectionString =
"SERVER=localhost;DATABASE=xxxxx;USER
ID=xxxxxx;PASSWORD=xxxx;ENCODING=UNICODE;";
            //
            // npgsqlDataAdapter1
            //
            this.npgsqlDataAdapter1.DeleteCommand = null;
            this.npgsqlDataAdapter1.InsertCommand = null;
            this.npgsqlDataAdapter1.SelectCommand = this.npgsqlCommand1;
            this.npgsqlDataAdapter1.UpdateCommand = null;
            //
            // dataSet1
            //
            this.dataSet1.DataSetName = "NewDataSet";
            //
            // DataGrid
            //
            this.CaptionBackColor =
System.Drawing.SystemColors.GradientActiveCaption;
            ((System.ComponentModel.ISupportInitialize)(this.dataSet1)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this)).EndInit();
            this.ResumeLayout(false);

        }

    }