折线使用DataBinding和PointCollection进行连续更新

first of all I describe my objective I want to achive. I want to visualise a continuous data stream (maximum 1000 values per second but could be reduced). This data stream should be visualised as a chart - being more precise it's a visualisation of an ECG among other things. My first idea was using polyline and bind it to a point collection. The problem here is that nothing is shown on the UI. Perhaps it's a wrong aproach for this task. Better ideas are welcomed. Here ist my code so far. First the View: first of all I describe my objective I want to