public class EmbeddedConnectionInfo : ReportEngineConnectionInfoBase

Public Class EmbeddedConnectionInfo
	Inherits ReportEngineConnectionInfoBase

private void SetEmbeddedReportEngineConnection(object sender, System.EventArgs e)
{
    this.reportViewer1.ReportEngineConnection = new Telerik.ReportViewer.Common.EmbeddedConnectionInfo().ConnectionString;
    //if the ReportEngineConnection property is set to null or empty string, it will use the EmbeddedConnectionInfo by default. 
}

Private Sub SetEmbeddedReportEngineConnection(sender As Object, e As System.EventArgs)
    Me.ReportViewer1.ReportEngineConnection = New Telerik.ReportViewer.Common.EmbeddedConnectionInfo().ConnectionString
    'if the ReportEngineConnection property is set to null or empty string, it will use the EmbeddedReportEngineConnectionInfo by default.
End Sub