public static async Task <HashSet <string> > GetAllNamespacesAsync(
this VisualStudioWorkspace workspace
)
{
if (workspace is null)
{
throw new ArgumentNullException(nameof(workspace));
}
var typeDict = await workspace.GetAllTypesInNamespaceRecursivelyAsync(null);
var allSolutionNamespaces = typeDict.Values.Select(t => t.ContainingNamespace.ToDisplayString()).ToHashSet();
return(allSolutionNamespaces);
}
