Upload Large Files in ASP.NET - Application Level

1. Modify the maxRequestLength and executionTimeout in the web.config

    <system.web>
      <httpRuntime maxRequestLength="102400" executionTimeout= "3600" />
    </system.web>

The configuration, allowing uploads of files up to 100MB and upload periods up to 1 hour

2. Modify the maxAllowedContentLength setting in the web.config

        <system.webServer>

      <security>

        <requestFiltering>

          <requestLimits maxAllowedContentLength="2147483648" />

        </requestFiltering>

      </security>

    </system.webServer>

References:
http://docs.telerik.com/devtools/aspnet-ajax/controls/upload/uploading-files/uploading-large-files
http://ajaxuploader.com/large-file-upload-iis-asp-net.htm