Maintain object reference not set to an instance of an object without try catch

<img id="userImage" alt="" src="@Html.ContentURL(Model.DisplayedUser.AvatarLocationUri, LingoJingo.Helpers.EnumHelper.DownloadTypes.ThumbnailImage)" style="min-height:65px;min-width:63px;" width="63" height="65" />
in above my image tag when data is not available then Object reference not set to an instance of an object error generated.
if any person haave a idean then give me solution.