Сamera rotates around Z axis, but I don't want that.

Questions & Answers
1

Here is my C# script for camera rotation:

    public void CameraRotate(Camera InputCamera, float InputRotationSpeed)
    {
        if (Input.GetButton("Rotate Camera") == true)
        {
            float MouseXMovement;
            float MouseYMovement;
            MouseXMovement = Input.GetAxis("UnityDefaultMouseX");
            MouseYMovement = Input.GetAxis("UnityDefaultMouseY");
            InputCamera.transform.Rotate(-MouseYMovement * InputRotationSpeed, MouseXMovement * InputRotationSpeed, 0);
        }
    }

But if I move cursor diagonally, or make circles with it, the camera also turns around Z axis, despite the fact that Z-rotation is set to zero. How I can avoid that?

Sorry for bad english. I hope you’ll understand me.

2

Fix it with:

InputCamera.transform.eulerAngles= new Vector3 (InputCamera.transform.eulerAngles.x,InputCamera.transform.eulerAngles.y,0);//That's one line, not two