Using Expression trees to Curry a Lambda

SampleCalls.cs

var func = WrapLambda<Outie, Innie, bool>(j => j.BoolVal, "Inner").Compile();
var resultTrue = func(new Outie { Inner = new Innie { BoolVal = true } });
var resultFalse = func(new Outie { Inner = new Innie() });

TestClasses.cs

public class Outie
{
	public Innie Inner { get; set; }
}

public class Innie
{
	public bool BoolVal { get; set; }
}

WrapTheExpression.cs

public Expression<Func<TOuter, TResult>> WrapLambda<TOuter, TInner, TResult>(Expression<Func<TInner, TResult>> innerExpression, String memberName)
{
	var oParam = Expression.Parameter (typeof(TOuter));
	var oAccess = Expression.MakeMemberAccess (oParam, typeof(TOuter).GetMember (memberName)[0]);
	return Expression.Lambda<Func<TOuter, TResult>> (Expression.Invoke (innerExpression, oAccess), oParam);
}