Debug text
Beginner Programmer
You can print debug text at runtime with DebugText. For example, you can use this to display a message when a problem occurs.
Note
Debug text is automatically disabled when you build the game in release mode.
In the Update method of your script, add:
DebugText.Print("My debug text",new Int2(x: 50, y: 50));
Where x and y are the pixel coordinates to display the text at.
The debug message is displayed when you run the game.

To hide debug text, use:
DebugText.Visible = false;
Example script
The following script checks that the texture MyTexture is loaded. If it isn't loaded, the game displays the debug text "MyTexture not loaded".
using Stride.Core.Mathematics;
using Stride.Engine;
using Stride.Graphics;
namespace MyGame
{
    public class Script : SyncScript
    {
		public Texture myTexture;
        public override void Start()
        {
            // Initialization of the script.
            myTexture = Content.Load<Texture>("MyTexture");
        }
        public override void Update()
        {
			if (myTexture == null)
                DebugText.Print("MyTexture not loaded", new Int2(x: 50, y: 50));
        }
    }
}