protectedinternal

using System;

public class Example
{
    protected internal int value = 5;
    protected internal class MyProtectedInternalNestedClass //nested class
    {
        public int temp = 4;
    }
}

class ProtectedInternalExample
{
    static void Main()
    {
        Example Obj = new Example();

      //the protected internal class and its member is accessible by the current assembly
        var obj2 = new Example.MyProtectedInternalNestedClass();
        Console.WriteLine("value is: {0}",Obj.value);
        Console.WriteLine("temp is: {0}", obj2.temp);

    }
}