Antrium A35D

 <security>
      <requestFiltering allowDoubleEscaping="true">
        <requestLimits maxQueryString="4096" />
      </requestFiltering>
    </security>

  <system.web>
 
    <httpRuntime maxQueryStringLength="4096" relaxedUrlToFileSystemMapping="true" requestValidationMode="2.0" />
   
  </system.web>

Yukarıdaki kodlar işinizi görecektir.