如果值在if语句之外不存在，如何添加到字典中？

Question

如果if语句之外的值不存在，如何添加到字典中？

我尝试将变量设为公开：

Public dictAdd As Dictionary(Of String, Integer) = New Dictionary(Of String, Integer)

我尝试为其创建函数：

Public Sub dictEdit(serviceName As String, serviceValue As Integer)
    dictAdd.Add(serviceName, serviceValue)
End Sub

添加：

'dictAdd.Add(serviceName, serviceValue)
 dictEdit(serviceName, serviceValue)

无论我做什么，我添加到字典中的任何内容都不在范围之外（如if语句）。我需要在整个代码中添加和删除值。

编辑：

这是我的代码：

Partial Class openapps_myapp
Inherits System.Web.UI.Page

Public dictAdd As Dictionary(Of String, Integer) = New Dictionary(Of String, Integer)

Public Sub dictEdit(serviceName As String, serviceValue As Integer)
    dictAdd.Add(serviceName, serviceValue)
End Sub

'Add CBLAvailable item to CBLModifications
 Protected Sub BtnAdd_Click(sender As Object, e As EventArgs) Handles BtnAdd.Click

    'Some code here that gets serviceName and serviceValue from a checkboxlist

    'Add each selected item from CBLAvailable to dictAdd
    'dictAdd.Add(serviceName, serviceValue)
    dictEdit(serviceName, serviceValue)

End Sub

Protected Sub BtnEdit_Click(sender As Object, e As EventArgs) Handles BtnEdit.Click

    'Some code here that defines replaceString

If dictAdd.ContainsKey(replaceString) Then
                CBLModifications.Items.Remove(CBLModifications.Items(i))
               'right here is my error - dictAdd doesn't have any values - it's empty
            End If

End Sub

'More irrelevant code here