private static extern bool CredDelete(string target, CRED_TYPE type, int flags);

    private enum CRED_TYPE

The CredDelete 'type' method parameter (int) must be one of the constant CRED_TYPE_* values.

    CredDelete("YourTarget", CRED_TYPE.GENERIC, 0);

public static extern bool CredRead(string target, CRED_TYPE type, int reservedFlag, out IntPtr credentialPtr);

    public enum CRED_TYPE : int

    if(CredRead(strTarget, CRED_TYPE.GENERIC, 0, out credPtr))

        public static extern bool CredRead(string target, CRED_TYPE type, int reservedFlag,

        public enum CRED_TYPE : uint

        public CRED_TYPE Type;

            public CRED_TYPE Type;

enum CRED_TYPE : uint

     CRED_TYPE_GENERIC = 1,

     CRED_TYPE_DOMAIN_PASSWORD = 2,

     CRED_TYPE_DOMAIN_CERTIFICATE = 3,

     CRED_TYPE_DOMAIN_VISIBLE_PASSWORD = 4

     userCredential.type = (UInt32)CRED_TYPE.CRED_TYPE_DOMAIN_PASSWORD;

const readonly int CRED_TYPE_GENERIC = 1;

const readonly int CRED_TYPE_DOMAIN_PASSWORD = 2;

const readonly int CRED_TYPE_DOMAIN_CERTIFICATE = 3;

const readonly int CRED_TYPE_DOMAIN_VISIBLE_PASSWORD = 4;

const readonly int CRED_TYPE_MAXIMUM = 5; // Maximum supported cred type

Public Enum CRED_TYPE