Type.FullName returns generic arguments without separator.

In next test case instead of return type name System.Collections.Generic.Dictionary2[[A, CreateTypeFromName.cs, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null],[B, CreateTypeFromName.cs, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null]] it returns

System.Collections.Generic.Dictionary2[[A, CreateTypeFromName.cs, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null][B, CreateTypeFromName.cs, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null]]

Here is test case:

using System;
using System.Collections.Generic;

public static class Program
{
    public static void Main(string[] args)
    {
        var dictionary = new Dictionary<A,B>();
        var dictionaryType = dictionary.GetType();
        Type type = Type.GetType(dictionaryType.FullName);
        if (type != null)
            Activator.CreateInstance(type);
        Console.WriteLine(
            "{0},{1}", dictionaryType.Name,dictionaryType.FullName
            );

    }
}

public class A { }
public class B { }