'How to get all C# types or namespaces that Roslyn couldn't find?

I'm using Roslyn to parse a C# project. I have a Microsoft.CodeAnalysis.Compilation object that represents this project. However, this project might not have been compiled successfully; there may be several reasons for this, but I'm specifically interested in any references to a type or a namespace that couldn't be resolved. How can I use my Compilation object to retrieve all unknown namespaces or types as IErrorTypeSymbols?

c++sharproslyncode-analysisroslyn-code-analysis


Solution 1:[1]

you can use semanticModel.GetSymbolInfo(identifierNameSyntax) which returns a SymbolInfo. SymbolInfo.Symbol is an ISymbol, so you can use ISymbol.ContainingNamespace to get the namespace an identifier belongs to.

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Solution Source
Solution 1 jeff cassar

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