private string UploadToBlob()
{
// TableTest();
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(
"connectionstring");
CloudFileClient fileClient = storageAccount.CreateCloudFileClient();
CloudFileShare share = fileClient.GetShareReference("fileshare");
CloudFileDirectory rootDir = share.GetRootDirectoryReference();
int size = 5 * 1024 * 1024;
byte[] buffer = new byte[size];
Random rand = new Random();
rand.NextBytes(buffer);
CloudFile file = rootDir.GetFileReference("Log3.txt");
file.UploadFromByteArrayAsync(buffer, 0, buffer.Length);
string result = "aa";
//Begins an asynchronous operation to upload the contents of a byte array to a file. If the file already exists on the service, it will be overwritten.
var res = file.BeginUploadFromByteArray(buffer, 0, buffer.Length, ProcessInformation, result);
//Ends an asynchronous operation to upload the contents of a byte array to a file.
//wait for the BeginUploadFromByteArray method execute completely then continue run the codes
file.EndUploadFromByteArray(res);
return("");
}