vb.net - Error Value of type 'String' cannot be converted to 'secure.echosign.com.ArrayOfString' -

i using adobe echosign web service create senddocument function in vb.net. tried solution in post using echosign api in vb.net no luck.

i getting error

value of type 'string' cannot converted 'secure.echosign.com.arrayofstring'

in code below @ .recipients = recipients(0)

public sub senddocument(byval apikey, byval filename, byval formfieldlayertemplatekey, byval recipient)    dim recipients() string = recipient  dim docrecipient recipientinfo = new recipientinfo() docrecipient     .email = recipient     .fax = "800-123-4567"     .role = recipientrole.signer end  dim doccreationinfo documentcreationinfo = new documentcreationinfo() doccreationinfo      .recipients = docrecipient(0)      .name = path.getfilename(file.name)      .message = testmessage      .fileinfos = fileinfos      .signaturetype = signaturetype.esign     .signatureflow = signatureflow.sender_signature_not_required end 

when try .recipients = recipients error reads

value of type '1-dimensional array of string' cannot converted 'secure.echosign.com.arrayofstring'.

any suggestions on how resolve error?

try assigning array of recipientinfo objects .recipients field:

'create recipientinfo object dim docrecipient recipientinfo = new recipientinfo docrecipient     .email = recipient     .fax = "800-123-4567"     .role = recipientrole.signer end  'create recipientinfo array new object contents dim recipients() recipientinfo = { docrecipient }  'create documentcreationinfo , assign array recipients field dim doccreationinfo documentcreationinfo = new documentcreationinfo doccreationinfo     .recipients = recipients     .name = path.getfilename(file.name)     .message = testmessage     .fileinfos = fileinfos     .signaturetype = signaturetype.esign     .signatureflow = signatureflow.sender_signature_not_required end