Question

I got this piece of code from somewhere in stackoverflow. I am unable to understand it. It is used to login to youtube. Iam new to C# and OOPS. So can anyone explain me few thigs:

1) In the 3rd line

 HttpWebRequest request = GetNewRequest("https://accounts.google.com/ServiceLoginAuth", cookies);

HttpWebRequest is a class and request is a object. But why New keyword is not used after that? and What is this “GetNewRequest” ? Is it a method? most of the time we use constructor of the class there with New keyword. So can I conclude that I can use any method of the class there? There is no need to use the new keyword and the constructor?

2) In the 6th line

Dictionary<string, string> parameters = new Dictionary<string, string>

Dictionary is class and parameters is the object. But what is this <string, string> there? I never seen parameters can be passed to a class.

3) In the 7th line

{
        {"continue","https%3A%2F%2Fwww.youtube.com%2Fsignin%3Faction_handle_signin%3Dtrue%26feature%3Dsign_in_button%26nomobiletemp%3D1%26hl%3Den_US%26next%3D%252F"},
        {"service","youtube"},{"uilel","3"},{"dsh","157212168103955870"},{"hl","en_US"},
        {"GALX","PTqcwpZb2aE"},{"pstMsg","1"},{"dnConn",""}, {"checkConnection","youtube%3A248%3A1"}, 
        {"checkedDomains","youtube"}, {"timeStmp",""}, {"secTok",""}, {"Email","username"}, {"Passwd","password"}, 
        {"signIn","Sign+in"}, {"PersistentCookie","yes"}, {"rmShown","1"}};

I can’t understand what is this? It cant fit to any syntax I read in C#. It is something I have never seen before.

COMPLETE CODE

public void Login()
{
    HttpWebRequest request = GetNewRequest("https://accounts.google.com/ServiceLoginAuth", cookies);
    request.Referer = "https://accounts.google.com/ServiceLogin?passive=true&continue=https%3A%2F%2Fwww.youtube.com%2Fsignin%3Faction_handle_signin%3Dtrue%26feature%3Dsign_in_button%26nomobiletemp%3D1%26hl%3Den_US%26next%3D%252F&uilel=3&hl=en_US&service=youtube";
    request.Host = "accounts.google.com";
    Dictionary<string, string> parameters = new Dictionary<string, string>{
        {"continue","https%3A%2F%2Fwww.youtube.com%2Fsignin%3Faction_handle_signin%3Dtrue%26feature%3Dsign_in_button%26nomobiletemp%3D1%26hl%3Den_US%26next%3D%252F"},
        {"service","youtube"},{"uilel","3"},{"dsh","157212168103955870"},{"hl","en_US"},
        {"GALX","PTqcwpZb2aE"},{"pstMsg","1"},{"dnConn",""}, {"checkConnection","youtube%3A248%3A1"}, 
        {"checkedDomains","youtube"}, {"timeStmp",""}, {"secTok",""}, {"Email","username"}, {"Passwd","password"}, 
        {"signIn","Sign+in"}, {"PersistentCookie","yes"}, {"rmShown","1"}};
    HttpWebResponse response = MakeRequest(request, cookies, parameters);
    response.Close();
}

Answer 1

1. GetNewRequest would be a method that actually creates and returns the instance of HttpWebRequest. So, new is not needed before the call to GetNewRequest. new is only needed when you are calling the constructor of the type in that same line as the declaration.
2. The <string, string> declaration after Dictionary specifies the key and value types, since Dictionary<TKey, TValue> is a generic type.
3. That is a way of initializing a dictionary with a list of key/value pairs. It’s just syntactic sugar. See Object Initialization. It’s just there to make your life easier/code more concise. That code is equivalent to the more verbose:

_

Dictionary<string, string> parameters = new Dictionary<string, string>();
parameters.Add("continue","https%3A%2F%2Fwww.youtube.com%2Fsignin%3Faction_handle_signin%3Dtrue%26feature%3Dsign_in_button%26nomobiletemp%3D1%26hl%3Den_US%26next%3D%252F");
parameters.Add("service","youtube");
// etc.