I have a programming exam this weekend. It is only one question that is asking to build an application. The final application must be based upon strategy pattern. I can provide an example of the...

Strategy/CloudDirectory.cspublic class CloudDirectory: IDirectory
{
public void CreateDirectory(string path)
{
string cloudPath = CloudStorageUtility.GetCloudPath(path);
if (cloudPath.IndexOf("/") != -1)
{
//create a placeholder as path
CloudBlob blob = CloudStorageUtility.Client.GetBlobReference
(cloudPath + "/:SpaceBlockPlaceholder:");
blob.UploadText("");
}
else
{
CloudBlobContainer container =
CloudStorageUtility.Client.GetContainerReference(cloudPath);
container.CreateIfNotExist();
}
}
public void Delete(string path)
{
string cloudPath = CloudStorageUtility.GetCloudPath(path);
if (cloudPath.IndexOf("/") != -1)
{
CloudBlobDirectory dir =
CloudStorageUtility.Client.GetBlobDirectoryReference(cloudPath + "/");
IEnumerable items = dir.ListBlobs();
foreach (IListBlobItem item in items)
{
if (item.GetType() == typeof(CloudBlobDirectory))
{
Delete(item.Uri.PathAndQuery);
}
else if (item.GetType() == typeof(CloudBlob) ||
item.GetType().BaseType == typeof(CloudBlob))
{
((CloudBlob)item).DeleteIfExists();
}
}
}
else
{
CloudBlobContainer container =
CloudStorageUtility.Client.GetContainerReference(cloudPath);
container.Delete();
}
}
public bool Exists(string path)
{
string cloudPath = CloudStorageUtility.GetCloudPath(path);
CloudBlobContainer container =
CloudStorageUtility.Client.GetContainerReference(cloudPath);
try
{
container.FetchAttributes();
return true;
}
catch
{
return false;
}
}
}
Strategy/CloudFile.cspublic class CloudFile: IFile
{
public void...