Source.

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Windows.Forms;

namespace FitPolynom

{

    public class ResultCell : DataGridViewTextBoxCell

    {

        protected override object GetFormattedValue(object value, int rowIndex, ref DataGridViewCellStyle cellStyle, TypeConverter valueTypeConverter, TypeConverter formattedValueTypeConverter, DataGridViewDataErrorContexts context)

        {

            if (value is double)

                return ((double)(value)).ToString("G6");

            return base.GetFormattedValue(value, rowIndex, ref cellStyle, valueTypeConverter, formattedValueTypeConverter, context);

        }

    }

}