public override string ToString()
{
StringBuilder buf = new StringBuilder();
string loc = null;
if (_frame != null)
{
loc = GetSourceLocation();
buf.Append("context [");
buf.Append(_frame.GetEnclosingInstanceStackString());
buf.Append("]");
}
if (loc != null)
buf.Append(" " + loc);
buf.Append(" " + base.ToString());
return buf.ToString();
}