オブジェクトについてる全コンポーネントのコピペ（上書き）

CopyPasteComponent.cs

using UnityEngine;
using System.Collections;
using UnityEditor;
using UnityEditorInternal;
using System.Linq;
using System.Collections.Generic;

public class CopyPasteComponent
{
	static GameObject cacheObject;
	static bool isCut = false;

	[MenuItem ("Edit/Component/Copy %#C")]
	static void Copy ()
	{
		isCut = false;
		cacheObject = Selection.activeGameObject;
	}

	[MenuItem ("Edit/Component/Paste %#X")]
	static void Cut ()
	{
		isCut = true;
		cacheObject = Selection.activeGameObject;
	}

	[MenuItem ("Edit/Component/Paste %#V")]
	static void Paste ()
	{
		if (cacheObject == null) {
			Debug.LogError ("Lost Original GameObject");
			return;
		}
		CopyComponents ();

		if (isCut == true) {
			RemoveComponents ();
		}
	}

	static void RemoveComponents()
	{
		var targetComponents = cacheObject.GetComponents<Component> ();
		foreach (var component in targetComponents) {
			if (component is Transform == false) {
				GameObject.DestroyImmediate (component);
			}
		}
	}

	static void CopyComponents ()
	{
		var currentGameObject = Selection.activeGameObject;

		var components = cacheObject.GetComponents<Component> ();
		var targetComponents = currentGameObject.GetComponents<Component> ();
		Dictionary<System.Type, int> currentComponentCount = new Dictionary<System.Type, int> ();

		foreach (var component in components) {
			var componentCount = targetComponents.Count (c => c.GetType () == component.GetType ());
			ComponentUtility.CopyComponent (component);
			if (componentCount == 0) {
				ComponentUtility.PasteComponentAsNew (currentGameObject);
			} else if (componentCount == 1) {
				var targetComponent = targetComponents.First (c => c.GetType () == component.GetType ());
				ComponentUtility.PasteComponentValues (targetComponent);
			} else {
				if (currentComponentCount.ContainsKey (component.GetType ()) == false) {
					currentComponentCount.Add (component.GetType (), 0);
				}
				var count = currentComponentCount [component.GetType ()];
				var targetComponentsWithType = targetComponents.Where (c => c.GetType () == component.GetType ());
				if (count < targetComponentsWithType.Count ()) {
					var targetComponent = targetComponents.Where (c => c.GetType () == component.GetType ()).ElementAt (count);
					currentComponentCount [component.GetType ()] += 1;
					ComponentUtility.PasteComponentValues (targetComponent);
				} else {
					ComponentUtility.PasteComponentAsNew (currentGameObject);
				}
			}
		}
	}
}