Comma “izing” a list of items

Question

Given a list of strings, what is the best method for concatenating these strings into a comma separated list with no comma at the end. (VB.NET or C#) (Using either StringBuilder

Answer 1

Dim Result As String
Dim Items As New List(Of String)
Items.Add("Hello")
Items.Add("World")

Result = String.Join(",", Items.ToArray())
MessageBox.Show(Result)

If you're really concerned about empty strings, use this join function:

Function Join(ByVal delimiter As String, ByVal items As IEnumerable(Of String), Optional ByVal IgnoreEmptyEntries As Boolean = True) As String
    Dim delim As String = ""
    Dim result As New Text.StringBuilder("")

    For Each item As String In items
        If Not IgnoreEmptyEntries OrElse Not String.IsNullOrEmpty(item) Then
            result.Append(delim).Append(item)
            delim = delimiter
        End If
    Next
    Return result.ToString()
End Function