Andrea,
My unit tests caught the following bug in "Members" property of SqlAzManApplicationGroup. It's only in version 3.6.0.10. I noticed that you have made some changes to this property but I couldn't figure out why.
Because "this.members" variable is now initialized in the constructor, so the following if statement is always false:

            if (this.members == null && this.GroupType == GroupType.Basic)
            {
                //// MOD: Dictionary creation moved from here fto constructor to handle LDAP Group correctly.
                //// OLD: this.members = new Dictionary<IAzManSid, IAzManApplicationGroupMember>();
                foreach (IAzManApplicationGroupMember m in this.GetApplicationGroupAllMembers())
                {
                    this.members.Add(m.SID, m);
                }
            }

Therefor, "Members" property will always return an empty collection. Even if somehow "this.members" is set to null before coming into the function, an exception will be thrown at this.members.Add.
 
I can't figure out why the change was made, so I can't fix it. Also, I don't know if we had similar changes in other properties.

 
Richard

    public Dictionary<IAzManSid, IAzManApplicationGroupMember> Members
    {
        get
        {
            if (this.members == null)
            {
                this.members = new Dictionary<IAzManSid, IAzManApplicationGroupMember>();
                foreach (IAzManApplicationGroupMember m in this.GetApplicationGroupAllMembers())
                {
                    this.members.Add(m.SID, m);
                }
            }
            return this.members;
        }
    }