C#: How do you handle exceptions?

1try
2{
3    var data = await GetDataAsync();
4}
5catch (HttpRequestException ex)
6{
7    Console.WriteLine($"HTTP error: {ex.Message}");
8}
9catch (Exception ex)
10{
11    Console.WriteLine($"Error: {ex.Message}");
12    throw;  // Re-throw
13}
14finally
15{
16    Cleanup();
17}

1catch (Exception ex) when (ex.Message.Contains("timeout"))
2{
3    // Handle timeout
4}