Resolved #506

framework/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Modal/AbpModalHeaderTagHelperService.cs

@@ -10,14 +10,23 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Modal
         {
             output.TagName = "div";
             output.Attributes.AddClass("modal-header");
-            output.Content.SetHtmlContent(CreateContent());
+            output.PreContent.SetHtmlContent(CreatePreContent());
+            output.PostContent.SetHtmlContent(CreatePostContent());
         }
 
-        protected virtual string CreateContent()
+        protected virtual string CreatePreContent()
         {
             var sb = new StringBuilder();
 
             sb.AppendLine("    <h5 class=\"modal-title\">" + TagHelper.Title + "</h5>");
+
+            return sb.ToString();
+        }
+
+        protected virtual string CreatePostContent()
+        {
+            var sb = new StringBuilder();
+            
             sb.AppendLine("    <button type=\"button\" class=\"close\" data-dismiss=\"modal\" aria-label=\"Close\">");
             sb.AppendLine("        <span aria-hidden=\"true\">&times;</span>");
             sb.AppendLine("    </button>");