Generating a Cryptographically Strong Seed in C#

static int GenerateCryptographiclyStrongSeed() {
    var randomBytes = new byte[4];

    // Generate 4 random bytes.
    var rng = new RNGCryptoServiceProvider();
    rng.GetBytes(randomBytes);

    // Convert 4 bytes into a 32-bit integer value.
    return (randomBytes[0] & 0x7f) << 24 |
                   randomBytes[1] << 16 |
                   randomBytes[2] << 8 |
                   randomBytes[3];
}