Checking if a user has View Rights in Site Collection

SPSite siteCollection = new SPSite("http://localhost"); 

SPWeb ParentWeb = siteCollection.OpenWeb("/"); 
SPUserCollection allUsers = ParentWeb.Users; 

  foreach ( SPUser user in allUsers) { 
      
     if (user.LoginName.ToLower() == "sandeep") { 

      SPRoleCollection allGroups = user.Roles; 

      foreach ( SPRole role in allRoles) { 
                
        int right = group.PermissionMask & SPRights.ViewListItems; 
       
 if (right == SPRights.ViewListItems) { 
                    
          Console.Write("User has Reader permissions."); 
                
         } 
       } 
     } 
   }