After installing the latest version of the toolkit I am getting the errors on every line which uses its methods:
```
AjaxControlToolkit is not declared
```
Example:
```
suggestions.Add(AjaxControlToolkit.AutoCompleteExtender.CreateAutoCompleteItem(GetLoginEmailString(lCurItem), CType(lCurItem("LoginID"), String)))
```
Originally the project used DLL version 3.5.60501 from 2012. I downloaded and installed the latest version, copied the DLL into the References of the project and removed/re-added the reference. Then I followed the doc re upgrading to 15.1 by reverting from ToolkitScriptManager to asp:ScriptManager.
What am I doing wrong?
Comments: Just to give you a bit more background: I'd be happy staying on v.3, but! The solution must be upgraded from VS 2010 to VS 2012 as it has a Data Project and 2010 VS can no longer open it due to the incompatible SSDT. Microsoft no longer provides SSDT for VS 2010. When I try to publish the Web project of this solution, which uses AjaxControlToolkit, in VS 2012, it stops and throws the errors: Unknown server tag 'asp:UpdatePanel' Unknown server tag 'asp:UpdateProgress' VS 2010 publishes this project just fine, but I cannot stay on 2010 due to above issue with Data project... So if I could stay on the old version of the DLL and resolve the unknown server tag errors, that would be ideal, versus spending time doing the upgrade and figuring out the errors in my original post. But if I absolutely have to upgrade, that's fine. Thank you!
```
AjaxControlToolkit is not declared
```
Example:
```
suggestions.Add(AjaxControlToolkit.AutoCompleteExtender.CreateAutoCompleteItem(GetLoginEmailString(lCurItem), CType(lCurItem("LoginID"), String)))
```
Originally the project used DLL version 3.5.60501 from 2012. I downloaded and installed the latest version, copied the DLL into the References of the project and removed/re-added the reference. Then I followed the doc re upgrading to 15.1 by reverting from ToolkitScriptManager to asp:ScriptManager.
What am I doing wrong?
Comments: Just to give you a bit more background: I'd be happy staying on v.3, but! The solution must be upgraded from VS 2010 to VS 2012 as it has a Data Project and 2010 VS can no longer open it due to the incompatible SSDT. Microsoft no longer provides SSDT for VS 2010. When I try to publish the Web project of this solution, which uses AjaxControlToolkit, in VS 2012, it stops and throws the errors: Unknown server tag 'asp:UpdatePanel' Unknown server tag 'asp:UpdateProgress' VS 2010 publishes this project just fine, but I cannot stay on 2010 due to above issue with Data project... So if I could stay on the old version of the DLL and resolve the unknown server tag errors, that would be ideal, versus spending time doing the upgrade and figuring out the errors in my original post. But if I absolutely have to upgrade, that's fine. Thank you!