http://blogs.msdn.com/b/josere/archive/2012/02/29/asp-net-internals-managed-runtime-loader.aspxIntroduction There is a file called aspnet.config in the .Net framework installation. This file is used to specify startup flags for both ASP.NET and CLR for those settings that are needed very early in the worker process lifetime, when the configen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/josere/archive/2012/02/29/asp-net-internals-managed-runtime-loader.aspx#10278099Tue, 06 Mar 2012 01:08:22 GMT91d46819-8472-40ad-a661-2c78acb4018c:10278099Jose Reyes - ASP.NET<p>Yes, it can be used to determine the first parameter for CorBindToRuntimeHost(). We hardcoded the version on the sample for simplicity. I believe it doesn&#39;t have the same format though. So you might need to add some logic there.</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10278099" width="1" height="1">http://blogs.msdn.com/b/josere/archive/2012/02/29/asp-net-internals-managed-runtime-loader.aspx#10277616Mon, 05 Mar 2012 11:34:43 GMT91d46819-8472-40ad-a661-2c78acb4018c:10277616Damien<p>Shouldn&#39;t pwszRuntimeVersion be used somewhere within LoadRuntimeInternal? I&#39;d have expected it to be used (or can you call out why it&#39;s not used/relevant?)</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10277616" width="1" height="1">