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Editorial Team
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Asked: 2026-05-27T11:08:02+00:00

does someone know how to update an assembly on a live ASP.NET web application

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does someone know how to update an assembly on a live ASP.NET web application in a way that the application stops displaying a runtime error page while the assembly is being copied into the bin folder ?

Context:
ASP.NET 4
IIS 7.5
ASP.NET Web application with a /bin folder

I’m using SFTP to copy one of the new assembly into the bin folder. It takes about 20 seconds to complete.
I suspect iis detect a change in the bin folder and recycles the application before the assembly is completely copied.

When the assembly is fully copied the application works correctly again.

Do you know a good configuration which would prevent this problem ?

EDIT————–

This asp.net application is bind to 2 different domain names, say a.app.com and b.appa.com
The domain name is used to select a theme before each page is displayed.

Using App_Offline.htm won’t work in this case or you need to create an unbranded page.

EDIT 2————–

App_Offline.htm also won’t work with ajax requests, JSON or not JSON.

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1 Answer

  1. Editorial Team

    http://weblogs.asp.net/scottgu/archive/2006/04/09/442332.aspx

    Create this page and use it you need to upload the dlls. After the dll is uploaded rename it to something else.

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