ProvideToolWindowAttribute::DocumentLikeTool Property
Visual Studio 2015
Set this property to true if you want a tool window that is like a document in its behavior and lifetime. The tool window will only be MDI or floating and will remain visible in its position across all layout changes until manually closed by the user at which point it will be destroyed. This flag implies DontForceCreate and destructive multi instance.
Assembly: Microsoft.VisualStudio.Shell.14.0 (in Microsoft.VisualStudio.Shell.14.0.dll)
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