C # Help dynamically change property value (Reflection)

I am trying to write a simple config in C # that reads XML and configures components (buttons, tabs, etc.) accordingly. My first catch is calling component, attribute and value from variables. Here is a small working snippet, but not how I want it to work since Im not passing the component name dynamically. (A "Blank" button has been added to the canvas called btnSample)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApplication5
{
  public partial class Window1 : Window
  {
    public Window1()
    {
        InitializeComponent();                       
    }

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
    }

    private void SetProperty(object target, string propertyName, object value)
    {
        PropertyInfo property = target.GetType().GetProperty(propertyName);
        property.SetValue(target, value, null);
    }

    private void btnSample_Click(object sender, RoutedEventArgs e)
    {
        SetProperty(btnSample, "Content", "Clicked");
    }
  }
}

      

        
        
        
      

    

This is not 100% what I want (above work), here (below does not work) as far as I got and I am stuck, I am trying to call name, attribute and value all from variables (coming from LINQ / XML), any help would be very helpful :)

using System;
using System.Collections.Generic;  
using System.Linq;
using System.Reflection;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApplication5
{
  public partial class Window1 : Window
  {
    string tar;

    public Window1()
    {
        InitializeComponent();                       
    }

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
    }

    private void SetProperty(object target, string propertyName, object value)
    {
        PropertyInfo property = target.GetType().GetProperty(propertyName);
        property.SetValue(target, value, null);
    }

    private void btnSample_Click(object sender, RoutedEventArgs e)
    {
        tar = "btnSample";
        SetProperty(tar, "Content", "Clicked");
    }
  }
}

      

        
        
        
      

    

I think I explained what to them after OK ... Thanks for taking the time to read :)