C# Definition:

[StructLayout(LayoutKind.Sequential)]
public struct CRYPT_ALGORITHM_IDENTIFIER
{
    [MarshalAs(UnmanagedType.LPStr)] public String pszObjId;
    public CRYPT_OBJID_BLOB Parameters;
}

alternative (without using CRYPT_OBJID_BLOB):

[StructLayout(LayoutKind.Sequential)]
public struct CRYPT_ALGORITHM_IDENTIFIER
{
   [MarshalAs(UnmanagedType.LPStr)] public string pszObjId;
   public int cbData;
   public IntPtr pbData;
}

VB Definition:

Structure CRYPT_ALGORITHM_IDENTIFIER
   Public TODO
End Structure

User-Defined Field Types:

None.

Notes:

None.