Returns the property name from a lambda expression

Extensions.cs

using System;
using System.Linq;
using System.Linq.Expressions;

namespace Extensions
{
    public class PropertyExtension
    {
        public static string GetFor<T>(Expression<Func<T>> propertyNameLambda)
        {
            return GetFor(new[] {propertyNameLambda}).First();
        }

        public static string[] GetFor<T>(params Expression<Func<T>>[] propertyNameLambda)
        {
            return propertyNameLambda
                .Select(property => property.Body)
                .OfType<MemberExpression>()
                .Select(member => member.Member.Name)
                .Concat(propertyNameLambda
                    .Select(property => property.Body)
                    .OfType<UnaryExpression>()
                    .Select(member => member.Operand)
                    .OfType<MemberExpression>()
                    .Select(member => member.Member.Name))
                .ToArray();
        }

        public static string GetFor<T,R>(Expression<Func<T,R>> propertyNameLambda)
        {
            return GetFor(new[] { propertyNameLambda }).First();
        }

        public static string[] GetFor<T,R>(params Expression<Func<T,R>>[] propertyNameLambda)
        {
            return propertyNameLambda
                .Select(property => property.Body)
                .OfType<MemberExpression>()
                .Select(member => member.Member.Name)
                .Concat(propertyNameLambda
                    .Select(property => property.Body)
                    .OfType<UnaryExpression>()
                    .Select(member => member.Operand)
                    .OfType<MemberExpression>()
                    .Select(member => member.Member.Name))
                .ToArray();
        } 
    }
}