InternalClassUtilities

using UnityEngine;
using System.Reflection;
using UnityEditor;

namespace Midva
{
    public class InternalClassUtilities
    {
        /// <summary>
        /// Getting from assembly variable and/or method that later can be called
        /// EXAMPLE: Get instance of ScriptableSingleton<GameViewSizes> and delete it so it gets reimported again
        /// </summary>
        private void InternalMethodAndProperty()
        {
            //Get assembly in which class we need is
            Assembly assembly = typeof(UnityEditor.Editor).Assembly;

            //Type of class we need
            System.Type gameViewSizesType = assembly.GetType("UnityEditor.GameViewSizes"); //TODO: Change string to class you need
            //In this example GameViewSizes is ScriptableSingleton<>, so we need to cast it to ScriptableSingleton as generic type GameViewSizes
            System.Type scriptableSingletonType = typeof(ScriptableSingleton<>).MakeGenericType(gameViewSizesType);

            //In this example we need property "instance" of ScriptableSingleton<>
            //Get all available properties in this class and print them
            PropertyInfo[] properties = scriptableSingletonType.GetProperties();
            Debug.LogError("Properties of " + scriptableSingletonType.Name + ":");
            foreach (PropertyInfo property in properties)
            {
                Debug.Log(property.Name);
            }
            //We need a instance property in this class
            PropertyInfo instanceProperty = scriptableSingletonType.GetProperty("instance");  //TODO: Change string to property you need

            //Get all available methods in this class and print them
            MethodInfo[] methods = gameViewSizesType.GetMethods();
            Debug.LogError("Methods of " + gameViewSizesType.Name + ":");
            foreach (MethodInfo method in methods)
            {
                Debug.Log(method.Name);
            }
            //Get one of those method
            MethodInfo methodChanged = gameViewSizesType.GetMethod("Changed"); //TODO: Change string to method you need

            //Get instance value
            object instanceObject = instanceProperty.GetValue(null, null);

            //Invoke method
            methodChanged.Invoke(instanceObject, null);

            //Delete so we regenerate ScriptableSingleton<> in this example
            //DestroyImmediate((Object)instanceObject);
        }
    }
}