/// <summary>
/// Returns a <see cref="System.String" /> that represents this instance.
/// </summary>
/// <returns>A <see cref="System.String" /> that represents this instance.</returns>
public override string ToString()
{
return((!string.IsNullOrWhiteSpace(ItemLeft) && !string.IsNullOrWhiteSpace(ItemRight))
? string.Format(BooleanSearchCore.expressionFormat, BooleanSearchCore.StringFieldToExpressionString(ItemLeft), Operator.ToString(), BooleanSearchCore.StringFieldToExpressionString(ItemRight))
: string.Empty);
}
