DropDownMenu in Inspector for Unity3D

DropDownMenuInInspector.cs

using UnityEditor;
[CustomEditor( typeof( SoundSystem ) )]
public class SoundSystemInspector : Editor{
	int type;
	public override void OnInspectorGUI()
	{
		DrawDefaultInspector();
		var script = target as SoundSystem;
		string[] strings = System.Enum.GetNames(typeof(SoundSystem.AudioType));
		this.type = EditorGUILayout.Popup(type,strings );
		if (GUILayout.Button("Play " + this.type))
		{
			script.PlaySound((SoundSystem.AudioType)this.type);
		}
	}
}