cannot find the system.web.UI namespace in a project reference in visual studio 2010 for the target framework ASP.NET 4.0

Question

while I got error "using System.Web.UI" as namespace not found. I tried to figure it out by adding the reference. But unfortunately in the .NET tab I couldn't find System.Web.UI component while other components were there. How to solve the issue ?

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Jon Skeet · Accepted Answer · 2012-08-03 18:42:30Z

2

EDIT: Okay, my original answer was based on the original version of the question...

Next up: do you have a reference to System.Web.dll which is the assembly which includes at least many of the classes in System.Web.UI?

answered Aug 3, 2012 at 18:42

Jon Skeet

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6 Comments

Md. Arafat Al Mahmud Over a year ago

yap that was a typo in my question. Now edited. And yes I want the namespace using System.Web.UI

Jon Skeet Over a year ago

@Md.ArafatAlMahmud: Well that's wasted my time for no reason... please be more careful in future. Do you have a reference to the System.Web.dll assembly?

Md. Arafat Al Mahmud Over a year ago

I have attached the screenshot what I found on my question.

Jon Skeet Over a year ago

@Md.ArafatAlMahmud: That looks like it's a display oddity... what exact project type do you have?

Md. Arafat Al Mahmud Over a year ago

I have found the assembly in C:\Program Files\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0 and my project type is ASP.NET web application

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