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I just installed a brand new Monodevelop, and first time to open, when i created a new solution for GTK#2.0, a error message prompted "Can't write into file Widget", and details as below,
System.NullReferenceException: Object reference not set to an instance of an object.
at MonoDevelop.Core.Assemblies.AssemblyContext.NormalizeAsmName(String name)
at MonoDevelop.Core.Assemblies.AssemblyContext.GetAssemblyForVersion(String fullName, String packageName, TargetFramework fx)
at MonoDevelop.Core.Assemblies.AssemblyContext.GetAssemblyNameForVersion(String fullName, String packageName, TargetFramework fx)
at MonoDevelop.Core.Assemblies.ComposedAssemblyContext.GetAssemblyNameForVersion(String fullName, String packageName, TargetFramework fx)
at MonoDevelop.Core.Assemblies.ComposedAssemblyContext.GetAssemblyNameForVersion(String fullName, TargetFramework fx)
at MonoDevelop.GtkCore.ReferenceManager.Update(String assm_version)
at MonoDevelop.GtkCore.GuiBuilder.GuiBuilderProject.Save(Boolean saveMdProject)
at MonoDevelop.GtkCore.WidgetFileDescriptionTemplate.AddToProject(SolutionItem policyParent, Project project, String language, String directory, String name)
at MonoDevelop.Ide.Templates.ProjectDescriptor.InitializeItem(SolutionItem policyParent, ProjectCreateInformation projectCreateInformation, String defaultLanguage, SolutionEntityItem item)
Created attachment 1902 [details]
error screen shot
Can't reproduce. Maybe this was fixed in the meantime?
There have been a lot of changes in MonoDevelop.Core.Assemblies since then, I'd assume it's fixed unless we get a repro or a report against 4.2.x.