Hi simonsabin,
From description, I understand that when you open and edit a style sheet file, Visual Studio 2005 will crash. For this scenario, I would like to know it occurs for editing all the style sheet files, or just the style sheet file in this project.
1. If Visual Studio will crash when editing all the style sheet files, this issue is mostly caused by third party application, service or Add-in.
Please test the issue in Windows Safe Mode. In addition, please run Visual Studio in Safe Mode by inputting "devenv /safemode" in Visual Studio 2005 Command Prompt. This method can disable third-party applications, services, and add-ins for Visual Studio that may cause the problem.
2. If Visual Studio will crash just for opening the style sheet file in this project, this issue is relate to the project. Please create a new web project and add the files from the original project to the new one by right clicking project and then select ?Add | Existing Item??.
Sincerely,
Benson Yu
Microsoft Online Community Support
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