predict stock price of aa using ml.net in csharp

main.cs
using System;
using Microsoft.ML;
using Microsoft.ML.Data;
using Microsoft.ML.Transforms;
using Microsoft.ML.Trainers;
using Microsoft.ML.Models;
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main.cs
public class StockData
{
    [LoadColumn(0)]
    public float Date;

    [LoadColumn(1)]
    public float Open;

    [LoadColumn(2)]
    public float High;

    [LoadColumn(3)]
    public float Low;

    [LoadColumn(4)]
    public float Close;

    [LoadColumn(5)]
    public float Volume;
}
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main.cs
var path = "path/to/training/data";
var reader = mlContext.Data.CreateTextReader<StockData>(separatorChar: ',', hasHeader: true);
var trainingData = reader.Read(path);
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main.cs
var pipeline = mlContext.Transforms.CopyColumns("Label", "Close")
    .Append(mlContext.Transforms.Categorical.OneHotEncoding("DateEncoded", "Date"))
    .Append(mlContext.Transforms.Concatenate("Features", "DateEncoded", "Open", "High", "Low", "Volume"))
    .Append(mlContext.Transforms.NormalizeMeanVariance("Features"))
    .Append(mlContext.Regression.Trainers.FastTree());
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main.cs
var model = pipeline.Fit(trainingData);
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main.cs
var predictionEngine = model.CreatePredictionEngine<StockData, StockPrediction>(mlContext);
var input = new StockData
{
    Date = 20170103,
    Open = 32.5F,
    High = 32.81F,
    Low = 32.37F,
    Volume = 4640500
};
var output = predictionEngine.Predict(input);
Console.WriteLine($"Predicted close price: {output.Close}");
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