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Are you sure that your application pool running the web site the version of .Net that you wrote in your code?
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Are you sure that your application pool running the web site the version of .Net that you wrote in your code?

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How to verify the application pool running the website is the correct .net version?<br />
The application has been running for a few years in the same environment, this error is something that I found out recently using Dynatrace SaaS.
</div>


How to verify the application pool running the website is the correct .net version?
The application has been running for a few years in the same environment, this error is something that I found out recently using Dynatrace SaaS.

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<div class="content wysiwyg-content">
My ASP.Net web application once has a internal server error when executing the method:<br />
<br />
<i>ASP.NET</i><br />

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<i>ExecuteRequestHandler</i>
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<br />
Is this IIS error or .Net framework error or application code error? How do I find out the root cause of that error?
</div>
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My ASP.Net web application once has a internal server error when executing the method:

ASP.NET
ExecuteRequestHandler

Is this IIS error or .Net framework error or application code error? How do I find out the root cause of that error?

ASP.Net ExecuteRequestHandler error

The successor to Active Server Pages, ASP.NET websites utilize the .NET framework to produce dynamic, data and content-driven web applications and services. ASP.NET code can be written using any .NET supported language. As of 2009, ASP.NET can also apply the Model-View-Controller (MVC) pattern to web applications

ASP.NET

The .NET Framework is not specific to any one programming language; rather, it includes a library of functions that allows developers to rapidly build applications. Several supported languages include C#, VB.NET, C++ or ASP.NET.