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copied!<p>NHibernate supports <a href="https://www.hibernate.org/hib_docs/nhibernate/1.2/reference/en/html_single/#mapping-types-basictypes" rel="noreferrer">DateTime, Ticks, TimeSpan and Timestamp</a>. Make sure you are specifying the type explicitly on your mapping element as the different time types have different semantics so what NHibernate is guessing may not be correct.</p> <p>If you are and are still having problems, modify your post to include the relevant portions of your entity, mapping file, and the actual problem you are encountering.</p> <p><strong>Edit:</strong></p> <p>For example, with the following class for a <code>TimeSpan</code>:</p> <pre><code>public class MyClass { // Other properties // ... // ... public virtual TimeSpan MyTimeProperty { get; set; } } </code></pre> <p>And the mapping file:</p> <pre><code> <property name="MyTimeProperty" type="TimeSpan" />  </code></pre> <p>You indicate that you're trying to map a TimeSpan ("nhibenate dont know to convert time field from db to a timespan, only string"). If this is the correct type matching between .NET (<code>typeof</code> <code>TimeSpan</code>) and the database (<code>DbType.Int64</code>), NH should do this automatically (i.e. you shouldn't need to specify <code>type="TimeSpan"</code>). So if it's not working, I suspect there is a problem with the way you have things setup. It may be helpful if you post the property/field declaration with full signature, the <code><property></code> line for this property from your mapping file, and the column definition from the database.</p>

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