Error CS0131: the left-hand side of an assignment must be a variable, a property or an indexer unity C#

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my problem in line 9

error CS0131: The left-hand side of an assignment must be a variable, a property or an indexer Unity C#

What I have tried:

public GameObject camera;
public Material skybox;
void Start () {
    if (File.Exists (Path.Combine (Environment.GetFolderPath (Environment.SpecialFolder.MyDocuments), "backgroundimage.txt")))
    {
        Camera cam = camera.GetComponent<Camera> ();
        cam.clearFlags = CameraClearFlags.Skybox;
        StreamReader reader = new StreamReader((Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), "backgroundimage.txt")));
        skybox.SetTexture = reader.ReadLine();
        cam.GetComponent<Skybox> ().material = skybox;
    }
    else
    {
        Camera cam = camera.GetComponent<Camera> ();
        cam.clearFlags = CameraClearFlags.SolidColor;
    }

Posted 6-Dec-19 20:56pm

Member 14013003

Updated 6-Dec-19 21:20pm

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OriginalGriff · Answer 1 · 2019-12-06T21:20:00

Look at the error message, it tells you what the problem is, and where.
So look at line 9 (CTRL+g will take you there in VS) and it is an assignment:

skybox.SetTexture = reader.ReadLine();

The name SetTexture implies a method to me, and you can't assign to a method.

So look at the documentation (a simple Google will get you there): Unity - Scripting API: Material.SetTexture[^]
Yes, it's a method. So you need to call it, and pass it two parameters:

skybox.SetTexture(reader.ReadLine, ???);

(Or similar) - and provide it with the Texture to set it to, replacing the "???" in my example.