wpf - RichTextBox with images - problem with line spacing -


i have problem. add images (smiles) richtextbox control extended wpf toolkit.

in function on converting simple text text images set line height of paragraph , paragraph add blocks of richtextbox. here it:

private void rptexttotextwithemoticons(string msg) {     //set line height     var para = new paragraph {lineheight = 40};      var r = new run(msg);      para.inlines.add(r);      string emoticontext = getemoticontext(r.text);      //if paragraph not contains smile add plain text richtextbox rtb2     if (string.isnullorempty(emoticontext))     {         rtbconversation.document.blocks.add(para);      }     else     {         while (!string.isnullorempty(emoticontext))         {              textpointer tp = r.contentstart;              // keep moving cursor until find emoticon text             while (!tp.gettextinrun(logicaldirection.forward).startswith(emoticontext))                  tp = tp.getnextinsertionposition(logicaldirection.forward);              // select of emoticon text             var tr = new textrange(tp, tp.getpositionatoffset(emoticontext.length)) { text = string.empty };              //relative path image smile file             string path = _mappings[emoticontext];              var image = new image             {                 source = new bitmapimage(new uri(path, urikind.relativeorabsolute)),                 width = 30,                 height = 30,             };              //insert smile             new inlineuicontainer(image, tp);              if (para != null)             {                 var endrun = para.inlines.lastinline run;                  if (endrun == null)                 {                     break;                 }                 else                 {                     emoticontext = getemoticontext(endrun.text);                 }              }         }         rtbconversation.document.blocks.add(para);     } }

but if add new paragraphs blocks paragraphs have various line height/spacing. need constat line height/spaccing between individual paragraph, chat in skype.

my problem can see on image: alt text

where can problem, helpless. thank advance.

just have @

how change richtextbox paragraph spacing?


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