Gets or sets the first formula in the data validation dropdown. It is used as bounds for 'between' and 'notBetween' relation operators, and the only formula used for other relational operators (equal, notEqual, lessThan, lessThanOrEqual, greaterThan, greaterThanOrEqual), or for custom or list type data validation. The content can be a formula or a constant or a list of series (comma separated values).

'Declaration
 
Public Property FirstFormula As String

'Usage
 
Dim instance As ExcelDataValidation
Dim value As String
 
instance.FirstFormula = value
 
value = instance.FirstFormula

public string FirstFormula {get; set;}