System.IO.IOException: Cannot create 'xxxxxx' because a file or directory with the same name already exists.

[greenozon]

Steps to reproduce

1. save as project

Error message shown

System.IO.IOException: Cannot create 'C:\Tmp\delme now\ILer\-' because a file or directory with the same name already exists.
   at System.IO.FileSystem.CreateDirectory(String fullPath, Byte[] securityDescriptor)
   at System.IO.Directory.CreateDirectory(String path)
   at ICSharpCode.Decompiler.CSharp.ProjectDecompiler.WholeProjectDecompiler.<>c__DisplayClass46_0.<WriteCodeFilesInProject>g__GetFileFileNameForHandle|2(TypeDefinitionHandle h) in /_/ICSharpCode.Decompiler/CSharp/ProjectDecompiler/WholeProjectDecompiler.cs:line 247
   at System.Linq.Lookup`2.Create(IEnumerable`1 source, Func`2 keySelector, IEqualityComparer`1 comparer)
   at System.Linq.GroupedEnumerable`2.ToList()
   at ICSharpCode.Decompiler.CSharp.ProjectDecompiler.WholeProjectDecompiler.WriteCodeFilesInProject(PEFile module, IList`1 partialTypes, CancellationToken cancellationToken) in /_/ICSharpCode.Decompiler/CSharp/ProjectDecompiler/WholeProjectDecompiler.cs:line 214
   at ICSharpCode.Decompiler.CSharp.ProjectDecompiler.WholeProjectDecompiler.DecompileProject(PEFile moduleDefinition, String targetDirectory, TextWriter projectFileWriter, CancellationToken cancellationToken) in /_/ICSharpCode.Decompiler/CSharp/ProjectDecompiler/WholeProjectDecompiler.cs:line 154
   at ICSharpCode.ILSpy.CSharpLanguage.DecompileAssembly(LoadedAssembly assembly, ITextOutput output, DecompilationOptions options)
   at ICSharpCode.ILSpy.TreeNodes.AssemblyTreeNode.Decompile(Language language, ITextOutput output, DecompilationOptions options)
   at ICSharpCode.ILSpy.TextView.DecompilerTextView.DecompileNodes(DecompilationContext context, ITextOutput textOutput)
   at ICSharpCode.ILSpy.TextView.DecompilerTextView.<>c__DisplayClass65_0.<SaveToDiskAsync>b__0()

Details

• ILSpy version 8.1.0.7490
  *.NET version 6.0.20-servicing.23320.17+a08d9ce2caf02455c0b825bcdc32974bdf769a80

test-p1.zip

[greenozon]

Still reproduced on

• ILSpy version 9.0.0.7612-preview1
• .NET version 8.0.3+9f4b1f5d664afdfc80e1508ab7ed099dff210fbd

@siegfriedpammer how about ILSpy will not try to create dir if it already exists?

[siegfriedpammer]

According to the documentation, the Directory.CreateDirectory method only creates the directory if it does not already exist, so this exception is not telling us, that the directory already exists, but it seems that a file with that name already exists and there is something else going on.