any body tell me ,
how to create a dll file in asp.net using vb.net
or please give me any websites for creating dll files in asp.net using vb.net.................

iam creating a dll file to avoid blank spaces of a string in a text box,
using asp.net with vb.net
it was not working properly,
here my coding is given below,,,

Imports System
Imports System.Reflection

Namespace fillblank
    Public Class Class1
        Private Sub blankspces()
            Dim a As String
            a.Replace(" ", String.Empty)
        End Sub
    End Class
End Namespace

give me the correct code to avoid empty spaces in a string of text box