重新设计了FlowLIbrary相关类；为工作台默认添加了基础依赖、默认画布。

NodeFlow/Tool/FlowLibraryAssemblyContext2.cs

@@ -0,0 +1,44 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using System.Runtime.Loader;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Serein.NodeFlow.Model.Library
+{
+
+    /// <summary>
+    /// 流程依赖加载
+    /// </summary>
+    public class FlowLibraryAssemblyContext : AssemblyLoadContext
+    {
+        private readonly AssemblyDependencyResolver _resolver;
+
+        /// <summary>
+        ///  创建新的加载上下文
+        /// </summary>
+        /// <param name="sereinFlowLibraryPath">类库路径</param>
+        /// <param name="name"></param>
+        public FlowLibraryAssemblyContext(string sereinFlowLibraryPath, string name) : base(name, isCollectible: true)
+        {
+            _resolver = new AssemblyDependencyResolver(sereinFlowLibraryPath);
+        }
+
+        protected override Assembly? Load(AssemblyName assemblyName)
+        {
+            string? assemblyPath = _resolver.ResolveAssemblyToPath(assemblyName);
+            if (!string.IsNullOrEmpty(assemblyPath))
+            {
+                var assembly = Default.LoadFromAssemblyPath(assemblyPath);
+                //var assembly = LoadFromAssemblyPath(assemblyPath);
+                return assembly;
+            }
+            else
+            {
+                return Default.Assemblies.FirstOrDefault(x => x.FullName == assemblyName.FullName);
+            }
+        }
+    }
+}