DIAGSESSION file format description

Many people share .diagsession files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .diagsession file can be edited, converted or printed with. On this page, we try to provide assistance for handling .diagsession files.

1 filename extension(s) found in our database.

.diagsession - Microsoft Visual Studio Diagnostic Session Data

The DIAGSESSION development files are related to Microsoft Visual Studio. The DIAGSESSION file is a Microsoft Visual Studio Diagnostic Session Data. Microsoft Visual Studio is a software development environment built on the .NET Framework that is designed for managing projects and development work in a variety of languages.

Microsoft Visual Studio
Development files
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Microsoft Visual Studio Diagnostic Session Data related extensions:
Microsoft Visual Studio Workspace Options
Microsoft Visual FoxPro Form
Microsoft Visual Studio iTrace Data
Microsoft Windows 8.1 App Bundle Manifest File
Microsoft Windows Provisioning XML Data
Microsoft Visual Studio Prototype Data

Naturally, other applications may also use the .diagsession file extension. Even harmful programs can create .diagsession files. Be especially cautious with .diagsession files coming from an unknown source!

Can't open a .diagsession file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

Operating systems

DataTypes.net currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

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DataTypes.net >> DIAGSESSION file