Помогите решить проблему с чатом на С#

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#define MAXBUF 1024
#include<time.h>
char* date(){
time_t t=time(NULL);
char *s=ctime(&t);
return s;
}



int main(int argc, char **argv)
{
  int lh_sd, ch_sd;  // ??????????? ???????
  // ????????? ????????? ?????????? ?????? (????????? ??????????, ????, ?????)
  struct sockaddr_in lh_addr;
  // ????????? ????????? ?????????? ?????? (????????? ??????????, ????, ?????)
  struct sockaddr_in rh_addr;
  struct in_addr *local_addr;
  socklen_t lh_addr_len, rh_addr_len; // ????? ????????
  int msg_len; // ?????????? ??????????? ????
  int buf_sz = 1024;  // ?????? ??????
  char buf[buf_sz];
  uint16_t port;  

  if(argc < 2){
    fprintf(stderr, "Usage\n %10s port\n", argv[0]);
    exit(1);
  }

  // ??????? ?????????? ??????, ??? ?????? ?? ????????? TCP
  if((lh_sd = socket(PF_INET, SOCK_STREAM, 0)) == -1){
    fprintf(stderr, "%10s: Create socket error: %s\n", argv[0], strerror(errno));
    exit(errno);
  }

  // ?????????????? ????????? ?????????? ?????? (????????? ??????????, ????, ?????)
  lh_addr.sin_family = AF_INET;
  port = htons(strtol(argv[1], 0, 0));
  lh_addr.sin_port = port;               // ????? ??????? ???? ????
  // ????? ????????? ?????? ?? ???? ????????? ???????????
  lh_addr.sin_addr.s_addr = INADDR_ANY;  

  // ?????????? ?????? ??? (?????? ????????? ?????????: ????? ? ????)
  if(bind(lh_sd, (struct sockaddr *)&lh_addr, sizeof(lh_addr)) == -1){
    fprintf(stderr, "%10s: Bind socket error: %s\n", argv[0], strerror(errno));
    exit(errno);
  }

  // ????????? ????? ? ????? ????????????? ??????????
  if(listen(lh_sd, 1) == -1){
    fprintf(stderr, "%10s: Listen socket error: %s\n", argv[0], strerror(errno));
    exit(errno);
  }
  printf("Listen...\n");
  rh_addr_len = sizeof(struct sockaddr_in);

  while(1){     // ???????? ???? ?? ?????
    // ????????? ??????????
    // rh_addr ??????????? ??????????? ?????????? ??????
    if((ch_sd = accept(lh_sd, (struct sockaddr*) &rh_addr,
        &rh_addr_len)) == -1){
      fprintf(stderr, "%10s: Accept connection error: %s\n", argv[0],  
              strerror(errno));
      exit(errno);
    }
    printf("Establish connection with: %s\n", inet_ntoa(rh_addr.sin_addr));
    // ????????? ?????? ?? ??????? ? ????? ?? ?? ??????????? ?????
    msg_len = 1;
    while(msg_len){
    if((msg_len = read(ch_sd, buf, buf_sz)) == -1){
          fprintf(stderr, "%10s: Read incoming data error: %s\n", argv[0],
                   strerror(errno));

exit(errno);
 
}

char *s=date();

send(ch_sd,s,strlen(s),0);
//send(ch_sd,buf,buf_sz,0);

write(1, buf, msg_len);


printf("Stoping server");  
 }
    // ????? ???????? ?????? ?????????? ? ????????? ?????????? ? ????????  
   
close(ch_sd);
    }
  //}

  return 0;
}

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include<netdb.h>
int main(int argc, char **argv)
{
  int sh_sd,portno; // ?????????? ??????
  // ????????? ????????? ?????????? ??????  (????????? ??????????, ????, ?????)
  struct sockaddr_in sh_addr;
struct hostent *server;
  int msg_len;  // ?????????? ??????????? ????
  int buf_sz = 1024; // ?????? ??????
  char buf[buf_sz];

  // ??????? ?????????? ?????? ??? ?????? ?? ????????? TCP
  if((sh_sd = socket(PF_INET, SOCK_STREAM, 0)) == -1){
    fprintf(stderr, "%10s: Create socket error: %s\n", argv[0], strerror(errno));
    exit(errno);
  }

  // ?????????????? ????????? ?????????? ?????? (????????? ??????????, ????, ?????)
  sh_addr.sin_family = AF_INET;
  sh_addr.sin_port = htons(strtol(argv[2], 0, 0));
portno=atoi(argv[2]);
server=gethostbyname(argv[1]);
if(server==NULL){fprintf(stderr,"ERROR,no such sost\n");exit(errno);}
//if(inet_aton(argv[1], &(sh_addr.sin_addr)) == 0){
  // fprintf(stderr, "%10s: IP not valid: %s\n", argv[0], strerror(errno));
   //exit(errno);
//}
bzero((char *) &sh_addr,sizeof(sh_addr));
sh_addr.sin_family=AF_INET;
bcopy((char *)server->h_addr,(char *)&sh_addr.sin_addr.s_addr,server->h_length);
sh_addr.sin_port=htons(portno);

  // ????????????? ?????????? ? ????????? ???????
  if(connect(sh_sd, (struct sockaddr *)&sh_addr, sizeof(sh_addr)) == -1){
    fprintf(stderr, "%10s: Connect error: %s\n", argv[0], strerror(errno));
    exit(errno);
  }


  printf("Establish connection with: %s\n", inet_ntoa(sh_addr.sin_addr));


  // ?????? ??????????? ???? ? ???????? ?? ??????
  msg_len = 1;
  while(msg_len){
    msg_len = read(0, buf, buf_sz);
    write(sh_sd, buf, msg_len);

recv(sh_sd,buf,sizeof(buf),0);
printf("%s \r",buf);

}



  close(sh_sd);

  return 0;
}