CODEWITHSUNDEEP
c#.net-assembly
user1675878
user1675878

Reputation: 31

How to return list of namespaces in System.Collections assembly?

This code does not return any namespaces, when called for System.Collections.

public static List<string> GetAssemblyNamespaces(AssemblyName asmName)
{
  List<string> namespaces = new List<string>();
  Assembly asm = Assembly.Load(asmName);

  foreach (Type typ in asm.GetTypes())
    if (typ.Namespace != null) 
      if (!namespaces.Contains(typ.Namespace))
        namespaces.Add(typ.Namespace);

  return namespaces;
}

Why is that? There are types in System.Collections. What can I do instead to get the namespaces?

Upvotes: 3

Views: 639

Answers (2)

L.B
L.B

Reputation: 116138

Different assemblies may contain the same(or sub) namespaces. For ex A.dll may contain the namespace A and B.dll may contain A.B. So you have to load all assemblies to be able to find namespaces.

This may do the trick, but it still has the problem that namespace can be in a not-referenced, not-used assembly.

var assemblies = new List<AssemblyName>(Assembly.GetEntryAssembly().GetReferencedAssemblies());
assemblies.Add(Assembly.GetEntryAssembly().GetName());

var nss = assemblies.Select(name => Assembly.Load(name))
            .SelectMany(asm => asm.GetTypes())
            .Where(type=>type.Namespace!=null)
            .Where(type=>type.Namespace.StartsWith("System.Collections"))
            .Select(type=>type.Namespace)
            .Distinct()
            .ToList();

For example, If you run above code, you will not get System.Collections.MyCollections since it is defined in my test code SO.exe :)

Upvotes: 1

Talha
Talha

Reputation: 19262

var namespaces = assembly.GetTypes()
                         .Select(t => t.Namespace)
                         .Distinct();

by using LINQ you can get the namespace of the assemly.

Upvotes: 0

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