Test.cs

using System;
using System.Windows;
using System.Collections.Generic;
using System.ComponentModel;
using Bentley.GenerativeComponents;
using Bentley.GenerativeComponents.AddInSupport;
using Bentley.GenerativeComponents.GCScript;
//using Bentley.GenerativeComponents.GCScript.NameScopes;
//using Bentley.GenerativeComponents.GeneralPurpose;
//using Bentley.GenerativeComponents.MicroStation;
using Bentley.GenerativeComponents.View;
using Bentley.DgnPlatformNET;
using Bentley.MstnPlatformNET;
using Bentley.DgnPlatformNET.DgnEC;
using Bentley.ECObjects.Schema;
using Bentley.ECObjects.Instance;
using Bentley.GenerativeComponents.ElementBasedNodes;
using Bentley.DgnPlatformNET.Elements;
using Bentley.GenerativeComponents.GCScript.GCTypes;
using Bentley.GenerativeComponents.GeneralPurpose.Collections;
using Bentley.GenerativeComponents.GeneralPurpose;
using Bentley.GenerativeComponents.ScriptEditor.Controls.ExpressionEditor;
using Bentley.EC.Persistence.Query;
using System.Windows.Controls;
using System.Linq;

namespace GCCommunity
{
    [GCNamespace("User")]
    [GCNodeTypePaletteCategory("Custom")]
    public class Test : ElementBasedNode
    {
        
        [GCDefaultTechnique]
        public NodeUpdateResult Default
        (
            NodeUpdateContext updateContext,
            [GCIn] ref string Property
        )
        {
            try
            {
                
            }
            catch (Exception ex)
            {
                return new NodeUpdateResult.TechniqueException(ex);
            }
            return NodeUpdateResult.Success;
        }
    }
}