How to fetch the details of the user if he is available within any one of the SharePoint Groups

Ascx

<%@ Assembly Name="$SharePoint.Project.AssemblyFullName$" %> <%@ Assembly Name="Microsoft.Web.CommandUI, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> <%@ Register Tagprefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> <%@ Register Tagprefix="Utilities" Namespace="Microsoft.SharePoint.Utilities" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> <%@ Register Tagprefix="asp" Namespace="System.Web.UI" Assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" %> <%@ Import Namespace="Microsoft.SharePoint" %> <%@ Register Tagprefix="WebPartPages" Namespace="Microsoft.SharePoint.WebPartPages" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> <%@ Control Language="C#" AutoEventWireup="true" CodeBehind="VisualWebPart1UserControl.ascx.cs" Inherits="SPUserFromGRoup.VisualWebPart1.VisualWebPart1UserControl" %> <table cellpadding="0" cellspacing="0"> <tr><td>Enter UserName</td><td><SharePoint:PeopleEditor ID="pplUserName" runat="server" MultiSelect="false" /></td></tr> <tr><td colspan="2" align="center"><asp:Button ID="btnPeopleSearch" runat="server"         Text="Search User" onclick="btnPeopleSearch_Click" /></td></tr> <tr> <td colspan="2"> <asp:GridView runat="server" ID="dgvSearchUser"></asp:GridView> </td> </tr> <tr><td colspan="2"><asp:label id="lblErrorMessage" runat="server"></asp:label> </td></tr> </table>

Ascx.cs

using System; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using Microsoft.SharePoint; using System.Security; namespace SPUserFromGRoup.VisualWebPart1 {     public partial class VisualWebPart1UserControl : UserControl     {         protected void Page_Load(object sender, EventArgs e)         {         }         protected void btnPeopleSearch_Click(object sender, EventArgs e)         {             try             {                 SPSecurity.RunWithElevatedPrivileges(delegate()                 {                     SPWeb currentWeb = SPContext.Current.Web;                     SPList lst = currentWeb.Lists["User Information List"];                     SPQuery sQuery = new SPQuery();                     sQuery.Query = "<OrderBy><FieldRef Name='ID' Ascending='False' /></OrderBy><Where><And><Eq><FieldRef Name='Name' /><Value Type='Text'>" + pplUserName.Accounts[0].ToString() +"</Value></Eq><Eq><FieldRef Name='ContentType' /><Value Type='Choice'>Person</Value></Eq></And></Where>";                     sQuery.ViewFields = "<FieldRef Name='Title' /><FieldRef Name='Name' /><FieldRef Name='EMail' /><FieldRef Name='Department' /><FieldRef Name='FirstName' /><FieldRef Name='LastName' />";                     sQuery.ViewFieldsOnly = true;                     SPListItemCollection myColl = lst.GetItems(sQuery);                     if (myColl.Count > 0)                     {                         dgvSearchUser.DataSource = myColl.GetDataTable();                         dgvSearchUser.DataBind();                     }                 });             }             catch (Exception ex)             {                 lblErrorMessage.Text = ex.ToString();             }         }     } }