System.Exception.GetExceptionMethodString C# (CSharp) Method

        private String GetExceptionMethodString() {
            MethodBase methBase = GetTargetSiteInternal();
            if (methBase==null) {
                return null;
            }
            // Note that the newline separator is only a separator, chosen such that
            //  it won't (generally) occur in a method name.  This string is used 
            //  only for serialization of the Exception Method.
            char separator = '\n';
            StringBuilder result = new StringBuilder();
            if (methBase is ConstructorInfo) {
                RuntimeConstructorInfo rci = (RuntimeConstructorInfo)methBase;
                Type t = rci.ReflectedType;
                result.Append((int)MemberTypes.Constructor);
                result.Append(separator);
                result.Append(rci.Name);
                if (t!=null)
                {
                    result.Append(separator);
                    result.Append(t.Assembly.FullName);
                    result.Append(separator);
                    result.Append(t.FullName);
                }
                result.Append(separator);
                result.Append(rci.ToString());
            } else {
                BCLDebug.Assert(methBase is MethodInfo, "[Exception.GetExceptionMethodString]methBase is MethodInfo");
                RuntimeMethodInfo rmi = (RuntimeMethodInfo)methBase;
                Type t = rmi.DeclaringType;
                result.Append((int)MemberTypes.Method);
                result.Append(separator);
                result.Append(rmi.Name);
                result.Append(separator);
                result.Append(rmi.Module.Assembly.FullName);
                result.Append(separator);
                if (t != null)
                {
                    result.Append(t.FullName);
                    result.Append(separator);
                }
                result.Append(rmi.ToString());
            }
            
            return result.ToString();
        }