Mehmet AYDIN

First,

Make definitions,

string siteURL = "http://siteURL";
SPSite site = new SPSite(siteURL);
SPWeb web = site.OpenWeb();

Get Current User,

SPUser user = web.CurrentUser;

Get User Informations,

string name = user.Name;
string loginName = user.LoginName;
string eMail = user.Email;

Hope this post helps,

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