Merge pull request #13382 from tamasvajk/feature/standalone-dll-unsafe

C#: Change standalone extraction to allow unsafe code

Author: tamasvajk

csharp/extractor/Semmle.Extraction.CSharp.Standalone/Extractor.cs

@@ -33,7 +33,9 @@ private static void AnalyseStandalone(
             CSharp.Extractor.Analyse(stopwatch, analyser, options,
                 references => GetResolvedReferencesStandalone(referencePaths, references),
                 (analyser, syntaxTrees) => CSharp.Extractor.ReadSyntaxTrees(sources, analyser, null, null, syntaxTrees),
-                (syntaxTrees, references) => CSharpCompilation.Create("csharp.dll", syntaxTrees, references),
+                (syntaxTrees, references) => CSharpCompilation.Create(
+                    "csharp.dll", syntaxTrees, references, new CSharpCompilationOptions(OutputKind.ConsoleApplication, allowUnsafe: true)
+                    ),
                 (compilation, options) => analyser.Initialize(compilation, options),
                 () => { },
                 _ => { },