Add VFS list example, with optional config

examples/TileDB.CSharp.Example/ExampleVFS.cs

@@ -0,0 +1,56 @@
+using System;
+using System.IO;
+using System.Collections.Generic;
+
+using TileDB.CSharp;
+using TileDB.CSharp.Examples;
+
+public class ExampleVFS
+{
+    private readonly string _array_path;
+    private readonly Context _ctx;
+    private readonly VFS _vfs;
+
+    public ExampleVFS()
+    {
+        var config = new Config();
+
+        // To use S3, set a path starting with `s3://` here:
+        _array_path = "test-example-vfs";
+
+        // To use S3, set credentials here (or in AWS_ environment variables)
+        //config.Set("vfs.s3.aws_access_key_id", "...");
+
+        // To use S3 custom headers, set key-value pairs here:
+        config.Set("vfs.s3.custom_headers.my_test_header", "test-test-1234");
+
+
+        _ctx = new Context(config);
+        _vfs = new VFS(_ctx);
+
+        if (_vfs.IsDir(_array_path))
+        {
+            _vfs.RemoveDir(_array_path);
+        }
+        _vfs.CreateDir(_array_path);
+    }
+
+    public void CreateFiles()
+    {
+        _vfs.Touch(_array_path + "/f1");
+    }
+
+    public void ListFiles()
+    {
+        var files = _vfs.GetChildren(_array_path);
+        files.ForEach(Console.WriteLine);
+    }
+
+   public static void Run()
+    {
+        var exampleVFS = new ExampleVFS();
+
+        exampleVFS.CreateFiles();
+        exampleVFS.ListFiles();
+    }
+}