private static PolicyLevel LoadPolicyLevelFromStringHelper(string str, string path, PolicyLevelType type) { if (str == null) { throw new ArgumentNullException("str"); } PolicyLevel level = new PolicyLevel(type, path); SecurityElement topElement = new Parser(str).GetTopElement(); if (topElement == null) { throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Policy_BadXml"), new object[] { "configuration" })); } SecurityElement element2 = topElement.SearchForChildByTag("mscorlib"); if (element2 == null) { throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Policy_BadXml"), new object[] { "mscorlib" })); } SecurityElement element3 = element2.SearchForChildByTag("security"); if (element3 == null) { throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Policy_BadXml"), new object[] { "security" })); } SecurityElement element4 = element3.SearchForChildByTag("policy"); if (element4 == null) { throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Policy_BadXml"), new object[] { "policy" })); } SecurityElement e = element4.SearchForChildByTag("PolicyLevel"); if (e == null) { throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Policy_BadXml"), new object[] { "PolicyLevel" })); } level.FromXml(e); return level; }