TextAsset.bytes

Description

The raw bytes of the text asset. (Read Only)

This property returns a new C# array with a copy of the asset data every time it's called. To get access the original asset data without creating an additional copy, use GetData.

using UnityEngine;

public class Example : MonoBehaviour
{
    // Drag a .jpg or .png file onto the image variable.
    TextAsset image;

    void Start()
    {
        var tex = new Texture2D(4, 4);
        tex.LoadImage(image.bytes);
        GetComponent<Renderer>().material.mainTexture = tex;
    }
}

Additional resources: text, GetData, Text Assets.