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Asked: 2026-05-11T15:25:42+00:00

I am using visual studio 2008 on vista business. We just recently upgraded from

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I am using visual studio 2008 on vista business. We just recently upgraded from xp. Now when I open a web project I get this error

ASP.NET runtime error: Length can not be less than zero. Parameter name: length<

in every .aspx file on this line of code:

<%@ Page Language='C#' MasterPageFile='~/Site.master' AutoEventWireup='true' CodeFile='ContactNotes.aspx.cs' Inherits='ContactNotes' Title='Contact Note' %>

This started happening after new install, anyone have any ideas on why this is happening?

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1 Answer

  1. Sounds like a Web.config issue. I remember getting this error when in the ASP.NET membership provider section, we had a constraint on the minimum password length, or something like that. This resulted in that error. Look for something similar. I know this is rather vague, but perhaps it’ll steer you in the right direction.

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