Lambda Generic Property Setter

LambdaGenericPropertySetter.cs

void Main()
{
	Test instance = new Test();

	instance.Dump("Before");
	instance.GetSetting(p => p.Thing);
	instance.GetSetting(p => p.AnotherThing);
	instance.GetSetting(p => p.StringThing);
	instance.Dump("After");
}

// Define other methods and classes here
public class Test 
{
	[System.ComponentModel.DefaultValue(12334)]
	public int Thing { get; set; }
	
	public int AnotherThing { get; set; }
	
	[System.ComponentModel.DefaultValue("Holy Cow")]
	public string StringThing { get; set; }
}

public static class PropertySetterExtensionMethods 
{
	public static void GetSetting<T, U>(this T target, Expression<Func<T, U>> propertyExpression)
	{
		var memberExpr = propertyExpression.Body as MemberExpression;
		if (memberExpr == null)
			throw new ArgumentException("propertyExpression should represent access to a member");

		// this is needed to load/save the value from storage
		string memberName = memberExpr.Member.Name;
		
		var defaultAttribute = memberExpr
								.Member
								.GetCustomAttributes(typeof(System.ComponentModel.DefaultValueAttribute), false)
								.Cast<System.ComponentModel.DefaultValueAttribute>()
								.SingleOrDefault();

		if (defaultAttribute == null)
			return;
		
		U defaultValue = (U)defaultAttribute.Value;
		
		if (defaultValue.GetType() != typeof(U))
			return;

		var property = memberExpr.Member as PropertyInfo;
		property.SetValue(target, defaultValue, null);
	}
}