ef to sql

EfUtility.cs

using System.Linq;
using System.Reflection;
using System.Collections.Generic;
using Microsoft.EntityFrameworkCore.Query.SqlExpressions;
using Microsoft.EntityFrameworkCore.Query;
using Microsoft.EntityFrameworkCore.Storage;

namespace MyNamespace
{
    public static class EfUtility
    {
        public static string ToSql<TEntity>(IQueryable<TEntity> query) where TEntity : class
        {
            using (IEnumerator<TEntity> enumerator = query.Provider.Execute<IEnumerable<TEntity>>(query.Expression).GetEnumerator())
            {
                object relationalCommandCache = enumerator.Private("_relationalCommandCache");
                SelectExpression selectExpression = relationalCommandCache.Private<SelectExpression>("_selectExpression");
                IQuerySqlGeneratorFactory factory = relationalCommandCache.Private<IQuerySqlGeneratorFactory>("_querySqlGeneratorFactory");

                QuerySqlGenerator sqlGenerator = factory.Create();
                IRelationalCommand command = sqlGenerator.GetCommand(selectExpression);

                string sql = command.CommandText;
                return sql;
            }
        }

        private static object Private(this object obj, string privateField) => obj?.GetType().GetField(privateField, BindingFlags.Instance | BindingFlags.NonPublic)?.GetValue(obj);
        private static T Private<T>(this object obj, string privateField) => (T)obj?.GetType().GetField(privateField, BindingFlags.Instance | BindingFlags.NonPublic)?.GetValue(obj);
    }
}