The 'SignaturePromptInfos' class represents a collection of electronic signature prompt information descriptions.
  Add | Adds the item to the collection at the specified position. | 
  Clone | Creates a copy of the object. | 
  Remove | Removes the item at the specified position from the collection. | 
  Count | The number of items in the collection. | 
  Item | Accesses the item at the specified position in the collection. |