C#

<pre lang="c#">
public static DataTable AsDataTable<T>(this IEnumerable<T> enumerable)
{
    if (enumerable == null)
    {
        throw new ArgumentNullException("enumerable");
    }

    DataTable table = new DataTable();
    if (enumerable.Any())
    {
        IList<PropertyInfo> properties = typeof(T)
                                            .GetProperties()
                                            .Where(p => p.CanRead && (p.GetIndexParameters().Length == 0))
                                            .ToList();

        foreach (PropertyInfo property in properties)
        {
            table.Columns.Add(property.Name, property.PropertyType);
        }

        IList<MethodInfo> getters = properties.Select(p => p.GetGetMethod()).ToList();

        table.BeginLoadData();
        try
        {
            object[] values = new object[properties.Count];
            foreach (T item in enumerable)
            {
                for (int i = 0; i < getters.Count; i++)
                {
                    values[i] = getters[i].Invoke(item, BindingFlags.Default, null, null, CultureInfo.InvariantCulture);
                }

                table.Rows.Add(values);
            }
        }
        finally
        {
            table.EndLoadData();
        }
    }

    return table;
}