This is an add-in for Fody

Exposes members and optionally implements interface of a field declared in class.

Introduction to Fody.

Nuget

Nuget package http://nuget.org/packages/Expose.Fody/

To Install from the Nuget Package Manager Console

PM> Install-Package Expose.Fody

Your Code

public interface ISample
{
    int Foo { get; set; }

    int Bar(int x, int y);
}

public class SampleClass: ISample
{
    public int Foo { get; set; }

    public int Bar(int x, int y)
    {
    	return x + y;
    }
}

public class SampleMembersExposer
{
	[ExposeMembers]
	private ISample innerSample;

	public SampleMembersExposer(SampleClass sample)
	{
		this.innerSample = sample;
	}
}

public class SampleImplicitExposer
{
	[ExposeInterfaceImplicitly]
	private ISample innerSample;

	public SampleImplicitExposer(SampleClass sample)
	{
		this.innerSample = sample;
	}
}

public class SampleExplicitExposer
{
	[ExposeInterfaceExplicitly]
	private ISample innerSample;

	public SampleExplicitExposer(SampleClass sample)
	{
		this.innerSample = sample;
	}
}

What gets compiled

public interface ISample
{
    int Foo { get; set; }

    int Bar(int x, int y);
}

public class SampleClass: ISample
{
    public int Foo { get; set; }

    public int Bar(int x, int y)
    {
    	return x + y;
    }
}

public class SampleMembersExposer
{
	private ISample innerSample;

	public SampleMembersExposer(SampleClass sample)
	{
		this.innerSample = sample;
	}

	public int Foo 
	{ 
		get { return innerSample.Foo; } 
		set { innerSample.Foo = value; }
	}

    public int Bar(int x, int y)
    {
    	return innerSample.Bar(x, y);
    }
}

public class SampleImplicitExposer: ISample
{
	private ISample innerSample;

	public SampleImplicitExposer(SampleClass sample)
	{
		this.innerSample = sample;
	}

	public int Foo 
	{ 
		get { return innerSample.Foo; } 
		set { innerSample.Foo = value; }
	}

    public int Bar(int x, int y)
    {
    	return innerSample.Bar(x, y);
    }
}

public class SampleExplicitExposer: ISample
{
	private ISample innerSample;

	public SampleExplicitExposer(SampleClass sample)
	{
		this.innerSample = sample;
	}

	int ISample.Foo 
	{ 
		get { return innerSample.Foo; } 
		set { innerSample.Foo = value; }
	}

    int ISample.Bar(int x, int y)
    {
    	return innerSample.Bar(x, y);
    }
}