IPv4 address to uint C# using stackalloc

GetIPV4AddressUint.cs

public static uint GetIPV4AddressUint(IPAddress ipAddr)
{
    if (ipAddr.AddressFamily is not AddressFamily.InterNetwork) throw new InvalidOperationException("GetIPV4AddressUint supports only ipv4 addresses");
    Span<byte> addrBytes = stackalloc byte[4];
    if (!ipAddr.TryWriteBytes(addrBytes, out int _)) throw new InvalidDataException("Unable to get ip address bytes");
    return ((uint)addrBytes[3] << 24) + ((uint)addrBytes[2] << 16) + ((uint)addrBytes[1] << 8) + addrBytes[0];
}