I need to store code in a string so that if a value is true, it is in the code line if not true its not in the code line. When I populate summarytextbox if consulting amount is "" then dont use this code if is does have an amount include the code. Is this possible? Other wise I would have to do a bunch if then statements. When I do the following below it cant convert to double.

Dim ConsultingFee As String 
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    If Session("ConsultingFeeAmount") = "" Then

    Else
'Store the following line in a string????
        ConsultingFee = +Environment.NewLine + Session("ConsultingFee") + " Amount: " + Session("ConsultingFeeAmount")

    End If



    SummaryTextBox.Text = Session("TeachingHospital") + Environment.NewLine + Session("HospitalAddress") + Environment.NewLine + Session("HospitalCity") + Environment.NewLine + Session("HospitalState") + Environment.NewLine + Session("HospitalZip") + Environment.NewLine + Session("HospitalTIN") + ConsultingFee

End Sub