Microsoft.VisualStudio.Project.ProjectNode.GetCATIDForType C# (CSharp) Method

        protected internal Guid GetCATIDForType(Type type)
        {
            if (type == null)
                throw new ArgumentNullException("type");

            if (catidMapping.ContainsKey(type))
                return catidMapping[type];
            // If you get here and you want your object to be extensible, then add a call to AddCATIDMapping() in your project constructor
            return Guid.Empty;
        }