How caching texture2D

Hi, I searched a long time on the web, but I did not find anything, I hope somebody in this forum can give me a hand.

I need to preload the texture2D at the start of the application, to make this assign to a List all the textures, using this code: myList.Add (Resoucers.Load ("My_Path/MyFile"));

The Textures are loaded well in the List, but when I want to use their reference, the Memory Textures in the Profiler increases. If I had loaded the texture before, how does memory ever increase?

Is there another way to preload the sprites in memory?