SHJX_GM/SHJX.Service.Shell/Flowchart/Model/FlowchartModel.cs

using System.Collections.ObjectModel;

namespace Flowchart
{
    class FlowchartModel
	{
		private ObservableCollection<FlowNode> _nodes = new();
        internal ObservableCollection<FlowNode> Nodes => _nodes;

        private ObservableCollection<Link> _links = new();
        internal ObservableCollection<Link> Links => _links;
    }
}