‘System.Web.UI.Compatibility.CompareValidator’ Could not Load Type

Hi Friends,

I found this problem during my first use of ASP.Net AJaX toolkit. To resolve this problem you have to add the validation.dll file in your bin folder and just commnet your tagMapping block exist in the Web.Config file and add the following:

Hope it will resolve your problem.
Vijay Modi


About Vijay Modi

Having 12+ years of experience in web application development. Expertise in various domains like E-Commerce, E-Learning, Insurance. I have expertise in web application development, window application development, Performance improvement, bug fixing etc. I have worked on various Microsoft technologies including ASP.Net, MVC, WebApi, WCF, Entity Framework, WPF, Window Application Development, AWS, Azure, AngularJS 2.0 / 1.5.2, .NetCore framework, jQuery. I am believing in quality work and achieving deadlines. Also like to work on new technologies and quick learner.
This entry was posted in Uncategorized and tagged . Bookmark the permalink.

4 Responses to ‘System.Web.UI.Compatibility.CompareValidator’ Could not Load Type

  1. Roger Harwood says:

    Absolute champion. this resolved my issue. Thank you very much.

  2. Alex says:

    It does not solve the whole problem. AnimationExtender from Ajaxtoolkit still does not work?

  3. Casey says:

    Thanks a bunch!

  4. Mike says:

    Rock on!

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s