Mono C# Getting data from socket gets OutOfMemory

Question

I have this simple code running on my windows server just fine, but when I run it in mono after a couple days I start getting only OutOfMemory exceptions.

public static byte [] TryReceive (Socket sock, out int nLength)
{
    nLength = 0;
    try {
    int size = sizeof(int);
    byte [] data;
    int recv = 0;
    int offset = 0;

    data = new byte [size];
    while (size > 0) {
        recv = sock.Receive(data, offset, size, SocketFlags.None);
        if (recv == 0)
        return null;
        offset += recv;
        size -= recv;
    } // Makes sure I read the correct number of bytes for an integer

            //Gets the size of the entire packet
    size = BitConverter.ToInt32(data, 0);
    offset = 0;
    data = new byte [size];

    while (size > 0) {
        recv = sock.Receive(data, offset, size, SocketFlags.None);
        offset += recv;
        size -= recv;
    } // Reads in the entire packet
    nLength = data.Length;
    byte [] dataGraph = new byte [data.Length - 1];
    Array.Copy(data, 1, dataGraph, 0, dataGraph.Length);
            //First byte is boolean specifying if it's compressed
    if (BitConverter.ToBoolean(data, 0))
        dataGraph = DecompressBytes(dataGraph);
    return dataGraph;
    }
    catch (OutOfMemoryException) { ObeServer.log.Log(1, "OutOfMemory when receiving packet."); return null; }
        //This error occurs after running for a a couple days on mono
}

Could someone please see something that might be causing this? This error NEVER occurs on my windows box. TIA