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The relative virtual path MyUserControl.ascx is not allowed here error in Web.Config
Problem
I am trying to add a user control in Web.Config file as below,
<controls>
<add tagPrefix="MyControl" tagName="MyUserControl" src="MyUserControl.ascx"/>
</controls>
It gives me following error,
Configuration Error: The relative virtual path 'MyUserControl.ascx' is not allowed here.
Solution
To resolve this issue, move your WebUserControl from root directory to a sub directory. For example in my case, I would copy
MyUserControl.ascx to sub folder "Controls". So my Web.Config entry should look like below.
<controls>
<add tagPrefix="MyControl" tagName="MyUserControl" src="~/Controls/MyUserControl.ascx"/>
</controls>
~ indicates relative path from root folder.
This is one of the limitation of ASP.Net application. It does not allow you to register user control in Web.Config file unless it's in a subfolder.
Comments/Questions
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