Events list item template with multiple categories

EventsListItemTemplate.cshtml

<h2 class="sys_subitem-heading sys_events-subheading"><a href="@CurrentNode.Path">@CurrentNode.Title</a></h2>
            
            <div class="sys_subitem-summary sys_events-summary">
                @if(CurrentNode.Data.Property_TaxonomyCategories.ToString() != ""){
                    string[] eventCategoriesTax = CurrentNode.Data.Property_TaxonomyCategories.ToString().Split(',');
                    string lastCategory = eventCategoriesTax[eventCategoriesTax.Length - 1];
                    string eventCategoriesString = "";
                    
                    foreach (string eventCategory in eventCategoriesTax) {
                        if(eventCategory.Contains("0/4/11/12")) {
                            var currentTaxNode = CurrentContext.Taxonomy.GetByKey(eventCategory.Replace(",",""));
                            if(currentTaxNode != null) {
                                var eventCategoryUrl = "?TaxonomyKey=" + currentTaxNode.Key;
                                if (eventCategory.Contains(lastCategory)) {
                                    eventCategoriesString += "<a href=\""+ @eventCategoryUrl +"\">" + currentTaxNode.Value + "</a>";
                                }else{
                                    eventCategoriesString += "<a href=\""+ @eventCategoryUrl +"\">" + currentTaxNode.Value + "</a>, ";
                                }
                            }
                        }
                    }                   
                    <div class="sys_events-category">@Html.Raw(eventCategoriesString)</div>
                }
            
                <dl>
          		<dt class="sys_events-time">Date</dt>
                    <dd class="sys_events-time">@CurrentNode.Data.StartDate.ToString("d/M/yyyy")</dd>
                    <dt class="sys_events-time">Time</dt>
                    <dd class="sys_events-time">@CurrentNode.Data.StartDate.ToString("HH:MM") - @CurrentNode.Data.EndDate.ToString("HH:MM")</dd>
                    @if(CurrentNode.Data.Location.ToString() != ""){
                        <dt class="sys_events-location">Location: </dt>
                        <dd class="sys_events-location">@CurrentNode.Data.Location</dd>          
                    }
                </dl>
            </div>