ICC.cs

public class ICC
{
	public ICC(string number)
	{
		Number = number;
	}

	public string Number { get; private set; }
}

ICCConvertionPattern.cs

public class ICCConvertionPattern : IConversionPattern<ICC, string>
{
	public Expression<Func<ICC, IMapper, MappingContext, string>> BuildConversionExpression(MappingStep mapping)
	{
		return (icc, mapper, context) => icc != null ? icc.Number : string.Empty;
	}
}

PIN.cs

public class PIN
{
	public PIN(string code)
	{
		Code = code;
	}

	public string Code { get; set; }
}

PINConvertionPattern.cs

public class PINConvertionPattern : IConversionPattern<PIN, string>
{
	public Expression<Func<PIN, IMapper, MappingContext, string>> BuildConversionExpression(MappingStep mapping)
	{
		return (pin, mapper, context) => pin != null ? pin.Code : string.Empty;
	}
}

Program.cs

internal class Program
{
	private static void Main()
	{
		var mapBuilder = new MapperBuilder();

		mapBuilder.Settings.AddConversionPatternType(typeof (ICCConvertionPattern));
		mapBuilder.Settings.AddConversionPatternType(typeof (PINConvertionPattern));

		var mapper = mapBuilder.BuildMapper();

		var sim = new SIM
		          	{
		          		ICC = new ICC("12345678901234567890"),
		          		PIN1 = new PIN("1234"),
		          		PIN2 = new PIN("5678")
		          	};

		var simDto = mapper.Convert<SIMDto>(sim);
	}
}

SIM.cs

public class SIM
{
	public ICC ICC { get; set; }
	public PIN PIN1 { get; set; }
	public PIN PIN2 { get; set; }
}

SIMDto.cs

public class SIMDto
{
	public string ICC { get; set; }
	public string PIN1 { get; set; }
	public string PIN2 { get; set; }
}