How to sort List based on column provided as input

Question

I have a generic list e.g:

public class Person
{
       public string Name {get;set;}
       public string loginId {get;set;}
       public string ContactNo {get;set;}
       public string City {get;set;}
       public string Country {get;set;}  
}

After filling the list, I bound the list to Repeater control. In HeaderTemplate of my repeater control I have defined LinkButton as:

<HeaderTemplate>
    <tr>
        <th width="100px">
           <asp:LinkButton ID="lnk1" runat="server" CommandName="Sort" CommandArgument="Name" Text="Name"></asp:LinkButton>
        </th>
        <th width="150px">
            <asp:LinkButton ID="lnk2" runat="server" CommandName="Sort" CommandArgument="loginId" Text="loginId"></asp:LinkButton>
        </th>
        <th width="100px">
                <asp:LinkButton ID="lnk3" runat="server" CommandName="Sort" CommandArgument="City" Text="City"></asp:LinkButton>
         </th>
    </tr>
</HeaderTemplate>

When user click any of the link, it fires ItemCommand event. In my ItemCommand method, I check for the command and if its a sort then Sort the list based on the CommandArgument.

Here is my command event:

protected void Repeater1_ItemCommand(object sender, RepeaterCommandEventArgs e)
   {
      if (e.CommandName == "Sort")
      {
         string str= e.CommandArgument.ToString();
         //var lst=ListPerson.OrderBy(c=>c.[PropertyName from CommandArgument ????]);
         var lst=ListPerson.OrderBy(?????)
       }
   } 
NOTE:ListPerson is my previously populated list of type Person.

Any help is appreciated.