ftpwebrequest - The underlying connection was closed. The server committed a protocol violation vb.net -


i need help, none can't seem find solution problem.

i'm trying create directory in ftp server: 

dim request ftpwebrequest = ftpwebrequest.create("ftp:\\*******")         dim creds networkcredential = new networkcredential("****", "*****")         request.credentials = creds         request.keepalive = true         request.enablessl = true         request.usepassive = true          request.timeout = 10000000         request.readwritetimeout = 10000000         servicepointmanager.servercertificatevalidationcallback = new system.net.security.remotecertificatevalidationcallback(addressof customcertvalidation)          dim resp ftpwebresponse = nothing         request.method = webrequestmethods.ftp.listdirectorydetails          using resp             resp = request.getresponse()             dim sr streamreader = new streamreader(resp.getresponsestream(), system.text.encoding.ascii)             dim s string = sr.readtoend()             if not s.contains("newfolder")                  request = ftpwebrequest.create("ftp:\\********")                 request.credentials = creds                 request.method = webrequestmethods.ftp.makedirectory                 resp = request.getresponse()                 console.writeline(resp.statuscode & "created")             else                 console.writeline("directory exists")             end if         end using     catch ex exception         console.writeline(ex.tostring)     end try

function customcertvalidation

function customcertvalidation(byval sender object,                                             byval cert x509certificate,                                             byval chain x509chain,                                             byval errors sslpolicyerrors) boolean     return true end function

i following error:

enter image description here

i have tried on web nothing seems work, can please tell me wrong. thank


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