private void LoadField()
{
if (_fields == null)
{
lock (_objLock)
{
if (_fields == null)
{
_fields = new FieldTypeCollection();
Type[] exportedTypes = Assembly.GetExecutingAssembly().GetTypes();
for (int i = 0; i < exportedTypes.Length; i++)
{
if (exportedTypes[i].IsClass)
{
if (exportedTypes[i].GetInterfaces().Contains(typeof(IField)))
{
_fields.Add(exportedTypes[i]);
}
}
}
}
}
}
}
