IEnumerableExtensions.cs

public static class IEnumerableExtensions
    {
        
        public static DataTable ConvertToDataTable<T>(this IEnumerable<T> rows, Func<PropertyInfo, bool> filter)
        {
            var type = typeof(T);
            if (type is DataRow) return rows.ConvertToDataTable();
            
            var properties = filter == null? type.GetProperties().ToList() : type.GetProperties().Where(filter).ToList();
            var table = BuildTable(type, properties);
            CreateRows(table, properties, rows);
            return table;
        }
internal static DataTable BuildTable(Type type, List<PropertyInfo> properties)
        {
            var table = new DataTable();
            properties.ForEach(prop => table.Columns.Add(prop.Name));
            return table;
        }
        internal static void CreateRows<T>(DataTable table, List<PropertyInfo> properties,IEnumerable<T> rows)
        {
            
            foreach (var row in rows)
            {
                var tableRow = table.NewRow();
                foreach (var column in table.Columns)
                {
                    properties.ForEach(property => tableRow[property.Name] = property.GetValue(row, null));
                }
                table.Rows.Add(tableRow);
            }
        }
            }