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Editorial Team
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Editorial Team
Asked: May 20, 20262026-05-20T07:47:00+00:00 2026-05-20T07:47:00+00:00

HI, When i compile my vs2008 solution which is a web application in debug

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HI,

When i compile my vs2008 solution which is a web application in debug mode i keep getting message box displayed which says that it cannot connect to “whatever.designer.cs”. Can anyone help me fix this as it is very annoying.

thanks
niall

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  1. Editorial Team
    Editorial Team
    2026-05-20T07:47:01+00:00Added an answer on May 20, 2026 at 7:47 am

    found a simple solution which is

    1) Right-click the designer file and select delete
    2) Right-click the aspx file and select Convert to Web Application

    which i got from
    http://www.hanselman.com/blog/ErrorConnectingToUndoManagerOfSourceFileQuotwhateverDesignerquot.aspx

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