Data connection type, default is AutoPassive which tries a connection with EPSV first and if it fails then tries PASV before giving up. If you know exactly which kind of connection you need you can slightly increase performance by defining a speicific type of passive or active data connection here.

public FtpDataConnectionType DataConnectionType { get; set; }

Public Property DataConnectionType As FtpDataConnectionType
	Get
	Set

public:
virtual property FtpDataConnectionType DataConnectionType {
	FtpDataConnectionType get () sealed;
	void set (FtpDataConnectionType value) sealed;
}