title: ASP.net RequiredFieldValidator VisualStudio 2012
body: <p>I am developing a project with ASP.net c#.
  I want RequiredFieldValidator to check my textbox. I am adding validator, and it works perfectly fine in Visual Studio 2010. But once i did the same thing, exactly same thing, it does not work in Visual Studio 2012. I am recieving this error:</p>
  
  <pre><code>[InvalidOperationException: WebForms UnobtrusiveValidationMode requires a ScriptResourceMapping for 'jquery'. Please add a ScriptResourceMapping named jquery(case-sensitive).]
     System.Web.UI.ClientScriptManager.EnsureJqueryRegistered() +2171326
     System.Web.UI.WebControls.BaseValidator.RegisterUnobtrusiveScript() +10
     System.Web.UI.WebControls.BaseValidator.OnPreRender(EventArgs e) +9576177
     System.Web.UI.Control.PreRenderRecursiveInternal() +83
     System.Web.UI.Control.PreRenderRecursiveInternal() +168
     System.Web.UI.Control.PreRenderRecursiveInternal() +168
     System.Web.UI.Control.PreRenderRecursiveInternal() +168
     System.Web.UI.Control.PreRenderRecursiveInternal() +168
     System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +974
  </code></pre>
  
  <p>My regards...</p>