title: How to create predicate dynamically
body: <p>Hi i want to create a list based on the search string using predicate expressions.</p>
  
  <p>I have a list of type products contains different names.</p>
  
  <pre><code>List&lt;products&gt; list1 = new List&lt;products&gt;();
  
          list1.Add(new products("sowmya"));
          list1.Add(new products("Jane"));
          list1.Add(new products("John"));
          list1.Add(new products("kumar"));
          list1.Add(new products("ramya"));
          listBox1.ItemsSource = list1;
  </code></pre>
  
  <p>Now i want to filter the content based on user input.User will enter n no of strings with '+' as separator. After receiving the strings i will pass them to predicate object like this</p>
  
  <pre><code> private void textBox1_KeyDown(object sender, KeyEventArgs e)
      {
          List&lt;products&gt; list2 = new List&lt;products&gt;();
          Expression&lt;Func&lt;products, bool&gt;&gt; predicate = PredicateBuilder.True&lt;products&gt;();
          if (e.Key == Key.Enter)
          {
              string Searchstring = textBox1.Text.ToString().Trim();
              string[] separator = new string[] { "+" };
              string[] SearchItems=Searchstring.Split(separator,StringSplitOptions.None);
              foreach (string str in SearchItems)
              {
                  string temp = str;
                  predicate =p =&gt; p.Name.Contains(temp.ToLower());                   
              }
  
              list2 = list1.AsQueryable().Where(predicate).ToList();
              listBox1.ItemsSource = list2;
          }
      }
  </code></pre>
  
  <p>If i enter more than one string(sowmya+jane+john) its giving only the last string(john) result but i want a list of all matching strings</p>
  
  <p>Please answer this question because i'm trying this but i couldn't get the result.</p>
  
  <p>Please do some help thanks.</p>