Gets all the blobs in wad-log4net from the last 24 hours (by last mod date). Also can be found here for easy linq pad use : http://share.linqpad.net/hltnqf.linq

Azure_GetLastDaysLogsFromStorage.cs

void Main()
{
	var accounts = new Dictionary<string,string>{
		{"accountname", "accountkey"},		
	};	
	
	var latestLogsByAppName = GetLatestLogsByAppName(accounts);
	latestLogsByAppName//.Where (l => !l.ApplicationName.Contains("WebRole") )
						//.Where(l => l.LastModified < DateTime.UtcNow.AddDays(-1))
						.OrderBy (l => l.LastModified)
						.Dump();
		
	//	var path = logContainer.DownloadLastBlobFromContainer(b=>b.Name.Contains("TerminalGatewayReadModelPopulator"));
	//	path.Dump();
	
}

public IEnumerable<BlobSummary> GetLatestLogsByAppName(Dictionary<string,string> accounts)
{
	foreach(var account in accounts)
	{		
		var cloudBlobClient = CreateCloudBlobClient(account.Key, account.Value);
		var logContainer = cloudBlobClient.GetContainerReference("wad-log4net");
		
		var latestlogsForThisContainer = logContainer.GetBlobsFromContainer()
													.OrderByDescending (x=> x.LastModified)
													.GroupBy (x => x.ApplicationName)
													.SelectMany (x => x.Take(1));
		foreach (var log in latestlogsForThisContainer)
		{
			yield return log;
		}		
	}
}

public CloudBlobClient CreateCloudBlobClient(string accountName, string accountKey)
{
	var storageConStr = string.Format("DefaultEndpointsProtocol=https;AccountName={0};AccountKey={1}", accountName, accountKey);
	var account = CloudStorageAccount.Parse(storageConStr);
	var cloudBlobClient = account.CreateCloudBlobClient();
	return cloudBlobClient;
}

public static class Ex
{
	public static IEnumerable<BlobSummary> GetBlobsFromContainer(this CloudBlobContainer container)
	{
		var blobs = container.ListBlobsSegmented(string.Empty, true, BlobListingDetails.Snapshots, null, null, null, null)
							.Results
							.Cast<CloudBlockBlob>();
		return blobs.Select (b => new BlobSummary { 
											ApplicationName=b.Name.Split('/').Last().Split('.').First (), 
											LastModified = b.Properties.LastModified.GetValueOrDefault().ToLocalTime(), 
											FileLength = b.Properties.Length, 
											Uri = b.Uri
							});
	}
	
	private static string GetFileSize(long filelength)
	{
		string[] sizes = { "B", "KB", "MB", "GB" };
		var len = filelength;
		int order = 0;
		while (len >= 1024 && order + 1 < sizes.Length) {
			order++;
			len = len/1024;
		}
		return string.Format("{0:0.##} {1}", len, sizes[order]);
	}
	
	public static string DownloadLastBlobFromContainer(this CloudBlobContainer container, Func<CloudBlockBlob,bool> whereClause = null )
	{
		var blobQuery = container.ListBlobsSegmented(string.Empty, true, BlobListingDetails.Snapshots, null, null, null, null)
							.Results
							.Cast<CloudBlockBlob>();
		if(whereClause != null) 
			blobQuery = blobQuery.Where(whereClause);
		
		var blob = blobQuery.OrderByDescending (x=> x.Properties.LastModified)
							.First();
		blob.Name.Dump("Downloading:");
		var blobcontents = blob.DownloadText();
		var tempPath = Path.GetTempFileName();
		File.AppendAllText(tempPath, blobcontents);
		return tempPath;
	}
	
	public static void DeleteBlobsFromContainer(this CloudBlobContainer container, Func<CloudBlockBlob,bool> whereClause = null )
	{
		var blobQuery = container.ListBlobsSegmented(string.Empty, true, BlobListingDetails.Snapshots, null, null, null, null)
							.Results
							.Cast<CloudBlockBlob>();
		if(whereClause != null) 
			blobQuery = blobQuery.Where(whereClause);
		
		var blobs = blobQuery.OrderByDescending (x=> x.Properties.LastModified);
		blobs.Select (b => new{b.Name, b.Properties.LastModified}).Dump("To delete :");
		foreach (var blob in blobs)
		{
			blob.Delete();
		}				
	}
}
public class BlobSummary
{
	public string Service { get{ return Uri.Host.Split('.').First();}}
	public string ApplicationName { get; set; }
	public string FileSize { get{ return GetFileSize(FileLength); } }
	public string Date { get{ return  LastModified.Value.ToString("dd MMM");}}
	public TimeSpan TimeOfday { get{ return  LastModified.Value.TimeOfDay;}}
	
	public DateTimeOffset? LastModified { get; set; }						
	public long FileLength { get; set; }	
	public Uri Uri { get; set; }
	
	private static string GetFileSize(long filelength)
	{
		string[] sizes = { "B", "KB", "MB", "GB" };
		var len = filelength;
		int order = 0;
		while (len >= 1024 && order + 1 < sizes.Length) {
			order++;
			len = len/1024;
		}
		return string.Format("{0:0.##} {1}", len, sizes[order]);
	}
}