title: Check if Graph API folder exists
body: <p>I am using Microsoft Graph API and I am creating a folder like so:</p>
  
  <pre><code>var driveItem = new DriveItem
  {
      Name = Customer_Name.Text + Customer_LName.Text,
      Folder = new Folder
      {
      },
      AdditionalData = new Dictionary&lt;string, object&gt;()
      {
          {"@microsoft.graph.conflictBehavior","rename"}
      }
  };
  
  var newFolder = await App.GraphClient
    .Me
    .Drive
    .Items["id-of-folder-I-am-putting-this-into"]
    .Children
    .Request()
    .AddAsync(driveItem);
  </code></pre>
  
  <p>My question is how do I check if this folder exists and if it does get the id of the folder?</p>