/// <summary>
/// Gets the value.
/// </summary>
/// <param name="row">The row.</param>
/// <param name="column">The column.</param>
/// <returns>IValueProvider.</returns>
/// <exception cref="System.NotImplementedException"></exception>
public double GetValue(int row, int column)
{
var value = _data[row, column] ?? (_data[row, column] = new ConstantValue(0));
return value.Value;
}
/// <summary>
/// Sets the value.
/// </summary>
/// <param name="row">The row.</param>
/// <param name="column">The column.</param>
/// <param name="value">The value.</param>
/// <exception cref="System.NotImplementedException"></exception>
public void SetValue(int row, int column, double value)
{
_data[row, column] = new ConstantValue(value);
}