C# Online Compiler | .NET Fiddle

using System;

public interface IStream
{
    void Write(string data);
}
public class CloudStream: IStream
{
    public virtual void Write(string data)
    {
        Console.WriteLine("Storing " + data);
    }
}
public class CompressedCloudStream: IStream
{
    private readonly IStream _stream;

    public CompressedCloudStream(IStream stream)
    {
        _stream = stream;
    }

    public void Write(string data)
    {
        var compressed = Compress(data);
        _stream.Write(compressed);
    }

    private string Compress(string data)
    {
        return data.Substring(0, 5);
    }
}
public class EncryptedCloudStream: IStream
{
    private IStream _stream;

    public EncryptedCloudStream(IStream stream)
    {
        _stream = stream;
    }

    public void Write(string data)
    {
        var encrypted = Encrypt(data);
        _stream.Write(encrypted);
    }

    private string Encrypt(string data)
    {
        return "!@#$%^^&&*";
    }
}
					
public class Program
{
	public static void Main()
	{
		var stream = new EncryptedCloudStream(new CompressedCloudStream(new CloudStream()));
		stream.Write("sensitive data");
	}
}

        var stream = new EncryptedCloudStream(new CompressedCloudStream(new CloudStream()));
 
using System;
​
public interface IStream
{
    void Write(string data);
}
public class CloudStream: IStream
{
    public virtual void Write(string data)
    {
        Console.WriteLine("Storing " + data);
    }
}
public class CompressedCloudStream: IStream
{
    private readonly IStream _stream;
​
    public CompressedCloudStream(IStream stream)
    {
        _stream = stream;
    }
​
    public void Write(string data)
    {

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