internal void Set(int pos, TextBufferItem item)
 {
     Buffer[pos] = item;
 }
 internal void Set(int pos, char ch, Color fg, Color bg, int fontIndex)
 {
     Buffer[pos] = new TextBufferItem(ch, fg, bg, fontIndex);
 }
 internal void Set(int col, int line, char ch, Color fg, Color bg, int fontIndex)
 {
     Buffer[col, line] = new TextBufferItem(ch, fg, bg, fontIndex);
 }
 internal void Set(int pos, TextBufferItem item)
 {
     Buffer[pos] = item;
 }
 internal void Set(int pos, char ch, Color fg, Color bg, int fontIndex)
 {
     Buffer[pos] = new TextBufferItem(ch, fg, bg, fontIndex);
 }
 internal void Set(int col, int line, char ch, Color fg, Color bg, int fontIndex)
 {
     Buffer[col, line] = new TextBufferItem(ch, fg, bg, fontIndex);
 }