using System;

using System.Linq;

using System.Linq.Expressions;

​

public class Program

{

    public static void Main()

    {

        ParameterExpression paramExp = Expression.Parameter(typeof(Context), "c");

        // c => c.User.Name.length

        MemberExpression memExp = CreateMemberExpression(paramExp, "User.Name.Length");

        Console.WriteLine(memExp);

    }

​

    private static MemberExpression CreateMemberExpression(ParameterExpression param, string path)

    {

        string[] split = path.Split('.');

        return (MemberExpression)split.Aggregate<string, Expression>(param, (exp, mth) => Expression.Property(exp, mth));

    }

}

​

class Context

{

    public User User { get; set; }

}

​

class User

{

    public string Name { get; set; }

}