如何在unity编辑器中显示以下KeyValuePair (以便它是可编辑的)

using UnityEditor;
using UnityEngine;

[CustomEditor(typeof(YourScript))]
public class YourScriptEditor : Editor
{
    public override void OnInspectorGUI()
    {
        YourScript yourScript = (YourScript)target;

        foreach (KeyValuePair<string, int> kvp in yourScript.keyValuePairs)
        {
            EditorGUILayout.BeginHorizontal();
            kvp.Key = EditorGUILayout.TextField(kvp.Key);
            kvp.Value = EditorGUILayout.IntField(kvp.Value);
            EditorGUILayout.EndHorizontal();
        }

        if (GUILayout.Button("Add KeyValuePair"))
        {
            yourScript.keyValuePairs.Add(new KeyValuePair<string, int>("", 0));
        }

        if (GUILayout.Button("Remove KeyValuePair"))
        {
            if (yourScript.keyValuePairs.Count > 0)
            {
                yourScript.keyValuePairs.RemoveAt(yourScript.keyValuePairs.Count - 1);
            }
        }

        if (GUI.changed)
        {
            EditorUtility.SetDirty(target);
        }
    }
}