Why can't C# SMO see extended properties on a column but Powershell SMO can?

I am attempting to read extended properties on tables and columns in a winforms C# application. I am using SQL Server SMO to do so. When I execute the application it does not see the extended properties, but when I read the extended properties using PowerShell, it does see the extended properties. The C# code: var x = col.ExtendedProperties.Count; var NPI = col.ExtendedProperties["NPI"].Value; bool npi = bool.Parse(NPI.ToString()); The PowerShell code: Add-Type -AssemblyName "Microsoft.SqlServer.Smo, Version=11.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91" $server = New-Object Microsoft.SqlServer.Management.Smo.Server $env:COMPUTERNAME $server.Databases[""].Tables[""].Columns[""].ExtendedProperties | Select Name, Value, State I have checked and both Visual Studio and PowerShell are using the same version of SMO (11.0.0.0). When I execute the C# code the col.ExtendedProperties.Count = 0, but when I execute the PowerShell code I get: Name Value State ---- ----- ----- NPI False Existing Does anyone have any ideas as to why this could be happening? ### Additional Information In the C# code I open up a DataReader on a table using: sourceServer.ConnectionContext.ExecuteReader() to retrieve the data from the table. I then go into a while loop with DataReader and inside that while loop I have: foreach (Column col in sourceTable.Columns) { StringBuilder cleanData = CleanseColumn(col, dr[col.Name].ToString()); sbvalues.Append("'" + cleanData + "', "); } When I step through the foreach, the sourceTable variable has its extended property, but the col column variable does not.