Filter.cs

        private async Task<Func<SomeEntity, bool>> Filters(string query)
        {
            if (string.IsNullOrEmpty(query)) return null;

            try
            {
                var conditions = query.Split(';', StringSplitOptions.RemoveEmptyEntries);

                StringBuilder conditionTexts = new StringBuilder();
                foreach (var item in conditions)
                {
                    var key = item.Split(':', StringSplitOptions.RemoveEmptyEntries)[0];
                    var value = item.Split(':')[1];

                    conditionTexts.Append($" data.{key}.ToLower().Contains(\"{ value.ToLower()}\") &&");
                }

                var filter = string.Format("data => {0}", conditionTexts.ToString().TrimEnd('&'));

                var options = ScriptOptions.Default.AddReferences(typeof(SomeEntity).Assembly);
                Func<SomeEntity, bool> filterExpression = await CSharpScript.EvaluateAsync<Func<SomeEntity, bool>>(filter, options);

                return filterExpression;
            }
            catch (Exception)
            {
                Console.WriteLine($"Filter parse error. Please check your --filter. Ex: ColumnName:Data;Column2:Data2...");
                return null;
            }
        }