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    <p>If your class with the <code>WriteLogDataToDb()</code> declared is called <code>ClassA</code>, then do two things. Make the method <code>static</code>, and you actually have to pass some <code>LogData</code> data through it.</p> <pre><code>public class AppForm { public static void WriteLogDataToDb(LogData data) { using (var db = new LogService.UserActivityDataContext()) { DbLogData logData = AutoMapper.Mapper.Map&lt;LogData, DbLogData&gt;(data); int t = (int)data.EventType; EventType eventType = db.EventTypes.FirstOrDefault(r =&gt; r.Id == t); if (eventType == null) { eventType = db.EventTypes.Add(new EventType { Event = GetEnumDescriptionAttributeValue(data.EventType), Id = (int)data.EventType }); db.SaveChanges(); } logData.EventTypeId = eventType.Id; db.LogEvents.Add(logData); db.SaveChanges(); } } } </code></pre> <p>Then in your <code>Start</code> code, you have to call <code>AppForm.WriteLogDataToDb(data)</code></p> <p><strong>Edit:</strong></p> <p>Now that these classes are in two different projects, you need to add reference so your <code>WindowsServiceHost</code> can use <code>AppForm</code>. To do this:</p> <ol> <li>Right-click > Properties on the project containing <code>AppForm</code>. On the Application tab, take note of the <code>Assembly name:</code></li> <li>Right-click the References item in <code>WindowsServiceHost</code> and choose <code>Add reference</code></li> <li>Go to the <code>Projects</code> tab</li> <li>Add the <code>Assembly name:</code> noted in step #1</li> <li>Right click <code>AppForm</code> in <code>WindowsSerivceHost</code> and <code>Resolve</code> by adding your using statement.</li> </ol>
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    1. POWhy Can't I call this method?
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    1. COI've updated my answer to include the class containing that method, however when I call `AppForm.WriteLogDataToDb();` it says the name "Appform" doesn't exist in the current context
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    2. COIs this all in one project? When you right-click, can you `Resolve`
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    3. CONo it won't let me Resolve, I forgot to mention this but these are in the same solution, but they are different projects
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