public static string[] GetContainerNames()
{
int BUFFSIZE = 512;
ArrayList containernames = new ArrayList();
uint pcbData = 0;
//String provider = null; //can use null, for default provider
String provider = "Crypto-Pro GOST R 34.10-2001 Cryptographic Service Provider";
String container = null; //required for crypt_verifycontext
uint type = PROV_RSA_FULL;
uint cspflags = CRYPT_VERIFYCONTEXT | CSPKEYTYPE; //no private key access required.
uint enumflags = PP_ENUMCONTAINERS; //specify container enumeration functdionality
IntPtr hProv = IntPtr.Zero;
uint dwFlags = CRYPT_FIRST;

bool gotcsp = Win32.CryptAcquireContext(ref hProv, container, provider, type, cspflags);
if (!gotcsp)
{
showWin32Error(Marshal.GetLastWin32Error());
return null;
}


StringBuilder sb = null;
Win32.CryptGetProvParam(hProv, enumflags, sb, ref pcbData, dwFlags);
BUFFSIZE = (int)(2 * pcbData);
sb = new StringBuilder(BUFFSIZE);

/* ---------- Get KeyContainer Names ------------- */
dwFlags = CRYPT_FIRST; //required initalization
while (Win32.CryptGetProvParam(hProv, enumflags, sb, ref pcbData, dwFlags))
{
dwFlags = 0; //required to continue entire enumeration
containernames.Add(sb.ToString());
}
if (hProv != IntPtr.Zero)
Win32.CryptReleaseContext(hProv, 0);

if (containernames.Count == 0)
return null;
else
return (string[])containernames.ToArray(Type.GetType("System.String"));
}

const uint PROV_RSA_FULL = 0x00000001;
const uint CRYPT_VERIFYCONTEXT = 0xF0000000;
static uint CSPKEYTYPE = 0;
const uint PP_ENUMCONTAINERS = 0x00000002;
const uint CRYPT_FIRST = 0x00000001;

const uint PP_CERTCHAIN = 0x00000009;
private static void showWin32Error(int errorcode)
{
Win32Exception myEx = new Win32Exception(errorcode);
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Error code:\t 0x{0:X}", myEx.ErrorCode);
Console.WriteLine("Error message:\t {0}\n", myEx.Message);
Console.ForegroundColor = ConsoleColor.White;
}