update

Packages/com.arongranberg.astar/Core/Misc/AssemblySearcher.cs

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+using System;
+using System.Collections.Generic;
+using System.Reflection;
+
+namespace Pathfinding.Util {
+	internal static class AssemblySearcher {
+		public static List<System.Type> FindTypesInheritingFrom<T>() {
+			var result = new List<System.Type>();
+			foreach (var assembly in System.AppDomain.CurrentDomain.GetAssemblies()) {
+				// Skip some assemblies which are known to not contain any graph types, for performance
+				var name = assembly.GetName().Name;
+				if (name.StartsWith("Unity.") || name.StartsWith("UnityEngine.") || name == "UnityEngine" || name.StartsWith("UnityEditor.") || name == "UnityEditor" || name.StartsWith("Mono.") || name.StartsWith("System.") || name == "System" || name.StartsWith("mscorlib") || name.StartsWith("I18N") || name == "netstandard" || name == "nunit.framework") continue;
+
+				System.Type[] types = null;
+				try {
+					types = assembly.GetTypes();
+				} catch {
+					// Ignore type load exceptions and things like that.
+					// We might not be able to read all assemblies for some reason, but hopefully the relevant types exist in the assemblies that we can read
+					continue;
+				}
+
+				foreach (var type in types) {
+#if NETFX_CORE && !UNITY_EDITOR
+					System.Type baseType = type.GetTypeInfo().BaseType;
+#else
+					var baseType = type.BaseType;
+#endif
+					while (baseType != null) {
+						if (System.Type.Equals(baseType, typeof(T))) {
+							result.Add(type);
+							break;
+						}
+
+#if NETFX_CORE && !UNITY_EDITOR
+						baseType = baseType.GetTypeInfo().BaseType;
+#else
+						baseType = baseType.BaseType;
+#endif
+					}
+				}
+			}
+			return result;
+		}
+	}
+}