httpwebrequest

hi im trying to convert java to c# now. trying to understand how to change this to C#.

first problem that i have met.

in java, httpConnection has the setRequestProperty and get HeaderField. however i cant find the equivalent for these in c# for cookie.

conn.setRequestProperty("cookie", mSession);

String cookie = conn.getHeaderField("Set-cookie");

second problem that i have met. i have changed the getResponseCode() to getResonse() in C#. but i got an error Cannot implicitly convert type 'System.Net.WebResponse' to 'int'. also i am trying to convert HttpConnection.HTTP_OK, dataInputStream and OpenInputStream to c#, which i could nto find an equivalent.

int rc=0; //conn.getResponseCode();

try{
rc=conn.getResponseCode();
}catch(Exception e)
{System.out.println(e);}

System.out.println("rc have already"+conn.getResponseCode());
if(rc==HttpConnection.HTTP_OK) {
StringBuffer text=new StringBuffer();


try{
DataInputStream din=new DataInputStream(conn.openInputStream());


int n=din.readInt();
while(n-->0) {
text.append(din.readUTF());
text.append(' ');
}
}

i changed the rc = getResponseCode() to rc = getResponse, but got this error..

Error 1 Cannot implicitly convert type 'System.Net.WebResponse' to 'int'

in java HttpConnection.HTTP_OK means request has succeeded. but i need to convert it to c#. what is the equivalent