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To read a HTTP network request via a socket using C#, follow these steps:

1. Create a TCP client: First, create a TCP client with the IP address and port number of the server you want to connect to:

TcpClient client = new TcpClient("server-ip-address", port-number);

1. Create a network stream: Once the client is created, create a network stream object from its underlying socket:

NetworkStream stream = client.GetStream();

1. Read the request: To read the request, create a buffer to store the incoming data and read the bytes from the network stream. Then, convert the bytes to a string and parse the request:

byte[] buffer = new byte[client.ReceiveBufferSize];
int bytesRead = stream.Read(buffer, 0, buffer.Length);
string requestString = Encoding.ASCII.GetString(buffer, 0, bytesRead);

1. Close the client and stream: After you have finished reading the request, make sure to close the network stream and TCP client:

stream.Close();
client.Close();

Note: Depending on how the HTTP request is formatted, you may need to parse it differently. For example, if the request has headers, you'll need to extract them from the request string. You may also need to handle cases where the request is split into multiple packets.