data.cs

public class CellFilterInstructions
{
  public double? CompareValue { get; set; } = null;
  public RelationalOperator? Operator { get; set; } = null;
  public Color TrueColor { get; set; } = Color.White;
  public Color FalseColor { get; set; } = Color.White;

  public enum RelationalOperator
  {
      Equals = 0,
      NotEqual,
      LessThan,
      GreaterThan,
  }
}