DataTableTools.cs

using System;
using System.Reflection;
using System.Data;
using System.Linq;
using System.Collections.Generic;

namespace DataTableTools
{
    static class DataTableTools
    {
        public static DataTable CreateDataTableFromType<T>()
        {
            Type type = typeof(T);
            DataTable dt = new DataTable(type.FullName);
            dt.Columns.AddRange(type.GetProperties().Select(p => new DataColumn(p.Name, p.PropertyType)).ToArray());
            return dt;
        }
        
        public static void FillTable<T>(IEnumerable<T> en, DataTable dt)
        {
            Type type = typeof(T);
            Dictionary<string,PropertyInfo> props = type.GetProperties().ToDictionary(p => p.Name);

            foreach(T e in en)
            {
                DataRow dr = dt.NewRow();
                foreach(DataColumn col in dt.Columns)
                {
                    dr[col.ColumnName] = props[col.ColumnName].GetValue(e);
                }

                if(!dr.ItemArray.All(x => x == null))
                {
                    dt.Rows.Add(dr);
                }
            }
        }
    }
}