GazeData.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TrackerBridge
{
    public struct GazeData
    {
        public readonly float leftX;
        public readonly float leftY;
        public readonly float rightX;
        public readonly float rightY;

        public readonly long trackerTimeStamp;
        public readonly long systemTimeStamp;

        public GazeData(float leftX, float leftY, float rightX, float rightY, long trackerTimeStamp, long systemTimeStamp)
        {
            this.leftX = leftX;
            this.leftY = leftY;
            this.rightX = rightX;
            this.rightY = rightY;
            this.trackerTimeStamp = trackerTimeStamp;
            this.systemTimeStamp = systemTimeStamp;
        }   

        public override string ToString()
        {
            FormattableString message = $"{leftX};{leftY};{rightX};{rightY};{trackerTimeStamp};{systemTimeStamp}";
            return FormattableString.Invariant(message);
        }
    }
}