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Monitor .NET CLR Garbage Collected heap from your web application

Use Zabbix to monitor your web application and application pool's .NET CLR Garbage Collected heap by utilizing WMI and PowerShell. Keeping track of .NET memory usage enables you to optimize usage and performance further.

By Jan Reilink 04/02/2022Windows Server

Umbraco

How to optimize Umbraco 8 performance

Out of the box, Umbraco is a well built and pretty fast content management system. However, it is still important you perform some steps to further optimize Umbraco's performance and loading speed. Here on Sysadmins of the North, I wrote about "11+ tips to optimize Umbraco CMS" earlier, and in this post I write about implementing them. On a just installed and running website.

By Jan Reilink 23/12/2021Umbraco

MySQL

How to fix System.Collections.Generic.KeyNotFoundException “The given key was not present in the dictionary” Exception with MySQL Connector/NET and utf8mb4 character set

An System.Collections.Generic.KeyNotFoundException "The given key was not present in the dictionary" can be the result of using a too old MySQL Connector/NET version in your ASP.NET web application.

By Jan Reilink 18/10/2019MySQL

Code base

ASP and ASP.NET connectionstring examples for Microsoft SQL Server and MySQL

This article provides you with a couple of ASP.NET to SQL Server connectionstring examples for ODBC and OLE DB. And as a bonus for ASP to SQL Server, MySQL, and SSL encrypted connections too.

By Jan Reilink 17/10/2018Code base

Code base

MySQL Connector/ODBC C# test script

Whenever you need to test your ASP.NET connection to your MySQL database, using ODBC, you can use the following C# test script. Currently it uses MySQL ODBC 8.0 Unicode Driver, but you can easily change the version used. As a bonus it prints some connection information and it requires an SSL connection to your MySQL database (SslMode=REQUIRED).

By Jan Reilink 03/10/2018Code base

Windows Server

How to: Determine which .NET Framework versions are installed

To get an accurate list of the .NET Framework versions installed on a computer, you can view the registry or query the registry in code. Note that the .NET Framework consists of two main components, which are versioned separately. Here is how to list installed ASP.NET versions using PowerShell.

By Jan Reilink 07/09/2017Windows Server

Windows Server

Remove IIS Server version HTTP Response Header

Windows Server IIS love to tell the world a website runs on IIS. And dito for ASP.NET Framework. But this gives hackers a lot of information, right? Let's remove the IIS Server header and ASP.NET version headers. Security by obscurity as a pro :-)

By Jan Reilink 06/07/2014Windows Server

Code base

How to: Test MySQL database connectivity in ASP.NET, PHP, ASP

Test MySQL database connectivity in ASP.NET, PHP, ASP; Simple MySQL connection test from your website with ASP.NET, PHP & classic ASP. Whenever you need a MySQL connectivity test from a website or server, it's handy to have various test scripts nearby. Whether it is because you are setting up a new website or you have just installed a new server and are running your tests.

By Jan Reilink 26/05/2014Code base

Umbraco

Configure SQLServer sessionState for Umbraco

Prepare your Umbraco website for high performance web garden or web farm and load balancing environments: Store your sessions out-of-process (OutProc). As opposed to the default in-process (inProc) sessions, where sessions are saved in the worker process. Create a high performing, fast loading Umbraco website.

By Jan Reilink 23/04/2014Umbraco

Code base

Add (custom) headers to MailMessage class

How to add custom headers to System.Net.Mail? When sending an email using the MailMessage class (System.Net.Mail namespace) in an ASP.NET website, certain email headers like Message-ID are not always set. When a Message-ID header is missing, email might be blocked by the recipients SMTP server like Gmail. Therefore it is necessary to set such headers.

By Jan Reilink 23/04/2014Code base

Windows Server

Target multiple ASP.NET versions with AppCmd.exe

You can address both x86 and x64 versions of .NET with AppCmd. When administering an IIS web server you frequently have to use AppCmd.exe to make configuration changes. Whether it is for a specific web site or server wide. Some think AppCmd is very limited, but here is how you can target multiple ASP.NET versions with AppCmd!

By Jan Reilink 18/02/2014Windows Server

Windows Server

Fix "Could not establish trust relationship for the SSL/TLS secure channel" error

Today one of our clients received a System.Net.WebException error on a newly deployed ASP.NET web application. Part of the exception was: "System.Net.WebException: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel.". Here is how we resolved that issue.

By Jan Reilink 17/07/2013Windows Server

Windows Server

ASP.NET performance: what to keep in mind

(ASP).NET programmers have to keep certain rules in mind when developing high performance ASP.NET applications, and/or optimizing your existing ASP.NET website. A lot of information is available on this subject. In this post I'll share some valuable posts, and I continue to update this post when I find something new. Posts about ASP.NET performance I frequently pass on to customers so they can improve their ASP.NET web applications.

By Jan Reilink 13/07/2013Windows Server

Code base

How to send authenticated SMTP over a TLS encrypted connection, in PHP, ASP and ASP.NET?

Send outgoing mail over authenticated SMTP using TLS, in PHP, ASP and ASP.NET. Send email securely from your website. Ready to use examples!

By Jan Reilink 15/05/2013Code base

Web applications

MySQL Connector/NET and Entity Framework

How to let MySQL Connector/NET, ASP.NET and Entity Framework play nicely. Set up and check your Web.config website configuration.

By Jan Reilink 26/02/2013Web applications