Get the current context of the site where web-part is added in the same site collection

Question

Hi,
I'm creating a visual web-part in SharePoint 2013 using server object model (can't user COM as the code will run on the same server) to get all the members of "Members" group of the site/web wherever this web-part
will be added (in the same site-collection), so it will take the context of the site wherever it is added.
For Eg: I have a site collection "http://<Server_name>/sites/Finance" OR "http://<Server_name>/sites/Finance/Microsoft" OR some other subsite. I have used SPContext.Current property to get the current context
, but no success :( . 
I tried in SPSite: SPContext.Current.Site ; new SPSite(SPContext.Current.Web.URL) and many other combinations with SPSite.
in SPWeb : site.openweb()
But I'm always getting the URL as "http://<Server_name>/" and not the context where the web-part is added in the same site collection.
Vipul Jain

Answer 1

Hi Bjoern,
Thanks for the reply. I'm able to get the access of members group through API's. Just wanted to know about the context in SPSite & SPWeb. As you suggested , is there no need to use SPSite ?
using (SPWeb web = SPContext.Current.Web)
                        SPGroup membersGroup = web.Groups[web.Name + " Members"];                     
                        SPUserCollection lstMembers = web.Groups[web.Name + " Members"].Users;
                        foreach (SPUser member in lstMembers)
                            // add all the group users to the list                            
                            users.Add(member.Name);
It's not working 
Vipul Jain