using System.Linq.Expressions;

using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine(GetPropertyName<Foo>(x => x.Id));

        Console.WriteLine(GetPropertyName<Foo>(x => x.Id.ToString()));

    }

    private static string GetPropertyName<T>(Expression<Func<T, object>> expression)

    {

        if (expression.Body is MemberExpression memberExpression)

        {

            return memberExpression.Member.Name;

        }

        if(expression.Body is UnaryExpression unaryExpression && unaryExpression.Operand is MemberExpression memberExpression2)

            return memberExpression2.Member.Name;

​

        throw new NotSupportedException($"Not supported case, fix me and add it to the unit test as supported case if its legit for EFC mapping, expression='{expression.ToString()}', compiled expression='{expression.Compile().ToString()}'");

    }

​

    class Foo

    {

        public int Id { get; set; }

        public string InternalId { get; set; }

        public string CatId { get; set; }

        public DateTimeOffset? DueDate { get; set; }

    }

}