System.Environment.GetEnvironmentCharArray C# (CSharp) Method

        private unsafe static char[] GetEnvironmentCharArray()
        {
            // Format for GetEnvironmentStrings is:
            // [=HiddenVar=value\0]* [Variable=value\0]* \0
            // See the description of Environment Blocks in MSDN's
            // CreateProcess page (null-terminated array of null-terminated strings).
            char* pStrings = Interop.Kernel32.GetEnvironmentStringsW();
            if (pStrings == null)
            {
                throw new OutOfMemoryException();
            }
            try
            {
                // Search for terminating \0\0 (two unicode \0's).
                char* p = pStrings;
                while (!(*p == '\0' && *(p + 1) == '\0')) p++;

                var block = new char[(int)(p - pStrings + 1)];
                Marshal.Copy((IntPtr)pStrings, block, 0, block.Length);
                return block;
            }
            finally
            {
                Interop.Kernel32.FreeEnvironmentStringsW(pStrings); // ignore any cleanup error
            }
        }