You can tell the asp.net compile engine to rerount the reqeust to new type.


        <pre data-sub="prettyprint:_">
        <tagMapping>
        <add tagType="System.Web.UI.WebControls.CompareValidator"           mappedTagType="Sample.Web.UI.Compatibility.CompareValidator, Validators, Version=1.0.0.0"/>
        <add tagType="System.Web.UI.WebControls.CustomValidator"            mappedTagType="Sample.Web.UI.Compatibility.CustomValidator, Validators, Version=1.0.0.0"/>
        <add tagType="System.Web.UI.WebControls.RangeValidator"             mappedTagType="Sample.Web.UI.Compatibility.RangeValidator, Validators, Version=1.0.0.0"/>
        <add tagType="System.Web.UI.WebControls.RegularExpressionValidator" mappedTagType="Sample.Web.UI.Compatibility.RegularExpressionValidator, Validators, Version=1.0.0.0"/>
        <add tagType="System.Web.UI.WebControls.RequiredFieldValidator"     mappedTagType="Sample.Web.UI.Compatibility.RequiredFieldValidator, Validators, Version=1.0.0.0"/>
        <add tagType="System.Web.UI.WebControls.ValidationSummary"          mappedTagType="Sample.Web.UI.Compatibility.ValidationSummary, Validators, Version=1.0.0.0"/>
        </tagMapping>
        </pre>