ObjectExtensions.cs

using System;
using System.Collections.Generic;
using System.Data;
using System.Runtime.CompilerServices;

public static class ObjectExtensions {
	public static void Dump(this Object o) {
		Console.WriteLine("{0,-30} {1}", "Name", "Value");
		Console.WriteLine("-----------------------------------------------------------------");
		foreach (var prop in o.GetType().GetProperties())
			try {
				Console.WriteLine("{0,-30} {1}", prop.Name, prop.GetValue(o, null));
			}
			catch { }
		Console.WriteLine();
	}
	
	public static DataTable ToTable(this object o, string tableName = null) {
			if (o == null || o is DataTable)
				return o as DataTable;
			var type = o.GetType();
			var table = new DataTable(tableName ?? type.Name);
			if (type.IsValueType || type == typeof(string)) {
				table.Columns.Add("Value", Nullable.GetUnderlyingType(type) ?? type);
				table.Rows.Add(o);
			}
			else {
				var props = type.GetProperties();
				var values = new object[props.Length];
				for (var i = 0; i < props.Length; ++i) {
					table.Columns.Add(props[i].Name, Nullable.GetUnderlyingType(props[i].PropertyType) ?? props[i].PropertyType);
					values[i] = props[i].GetValue(o) ?? DBNull.Value;
				}
				table.Rows.Add(values);
			}
			return table;
		}

		public static DataTable ToTable<T>(this IEnumerable<T> items, string tableName = null) {
			var type = typeof(T);
			var table = new DataTable(tableName ?? type.Name);
			if (type.IsValueType || type == typeof(string)) {
				table.Columns.Add("Value", Nullable.GetUnderlyingType(type) ?? type);
				foreach (var item in items)
					table.Rows.Add(item);
			}
			else {
				var props = type.GetProperties();
				foreach (var prop in props)
					table.Columns.Add(prop.Name, Nullable.GetUnderlyingType(prop.PropertyType) ?? prop.PropertyType);
				foreach (var item in items) {
					var values = new object[props.Length];
					for (var i = 0; i < props.Length; i++)
						values[i] = props[i].GetValue(item) ?? DBNull.Value;
					table.Rows.Add(values);
				}
			}
			return table;
		}
}