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    copied!<p>That won't be an actual <em>leak</em>, but it could be stressing things unnecessarily...</p> <p>How many rows are you working over? Note that reflection is a pain, and that every call to things like <code>GetCustomAttributes</code> can return a new array (so you want to do that once, not once per-property-per-row).</p> <p>Personally, I'd pre-construct the work I intend to do... something like below.</p> <p>Note that if I was doing this lots, I'd either switch to <a href="http://www.codeproject.com/KB/cs/HyperPropertyDescriptor.aspx" rel="noreferrer">HyperDescriptor</a>, or if .NET 3.5 was an option, maybe a compiled Expression. Since <code>DataTable</code> isn't strongly typed, <code>HyperDescriptor</code> would be a logical next step (for performance) after the below...</p> <pre><code>sealed class Tuple&lt;T1, T2&gt; { public Tuple() {} public Tuple(T1 value1, T2 value2) {Value1 = value1; Value2 = value2;} public T1 Value1 {get;set;} public T2 Value2 {get;set;} } public static List&lt;T&gt; Convert&lt;T&gt;(DataTable table) where T : class, new() { List&lt;Tuple&lt;DataColumn, PropertyInfo&gt;&gt; map = new List&lt;Tuple&lt;DataColumn,PropertyInfo&gt;&gt;(); foreach(PropertyInfo pi in typeof(T).GetProperties()) { ColumnAttribute col = (ColumnAttribute) Attribute.GetCustomAttribute(pi, typeof(ColumnAttribute)); if(col == null) continue; if(table.Columns.Contains(col.FieldName)) { map.Add(new Tuple&lt;DataColumn,PropertyInfo&gt;( table.Columns[col.FieldName], pi)); } } List&lt;T&gt; list = new List&lt;T&gt;(table.Rows.Count); foreach(DataRow row in table.Rows) { if(row == null) { list.Add(null); continue; } T item = new T(); foreach(Tuple&lt;DataColumn,PropertyInfo&gt; pair in map) { object value = row[pair.Value1]; if(value is DBNull) value = null; pair.Value2.SetValue(item, value, null); } list.Add(item); } return list; } </code></pre>
 

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