/// <summary>
/// Return the unique symbol associated with a
/// string. Repeated calls to CreateSymbol will return the
/// same Symbol.
/// </summary>
internal static Symbol CreateSymbol(string n)
{
n = LateBinding.MapToInternalName(n);
string u = String.Intern(n);
Symbol s = (Symbol)dict [u];
if (s == null)
{
s = new Symbol(u);
dict [u] = s;
}
return(s);
}