Blend for Visual Studio data
File type: Various data file
The ._bsln140 file extension identifies data used by Blend for Visual Studio.
These files contain internal information used by Blend when working with application projects.
File type category:
Various data file
Date updated: October 7, 2026
The ._bsln140 file extension is associated with Microsoft Expression Blend, Microsoft's Windows design tool for building applications with Visual Studio.
A ._bsln140 file is a supporting data file for Blend rather than a standalone application document. It is used together with the related Blend or Visual Studio project data.
Open the associated project in Microsoft Expression Blend on Windows. The ._bsln140 file is normally used by Blend as part of the project data and may not open as an independent document.
If the file was separated from its project, keep it with the other project files and open the project instead.
The ._bsln140 format is an internal Blend data format and is not normally converted on its own.
To move the associated work to another project format, open the project in a compatible version of Microsoft Expression Blend or Visual Studio and use that application's project or export options.
Software applications that handle other tasks involving _bsln140 files:
Microsoft Windows
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