Get rid of System.Web dependency

[kinguru]

Dear Alexander,
could you please add the Raw example using "System.Net.WebUtility.HtmlEncode" as it recommended to use in non-web projects.
System.Web even not available in a non-web projects so can't encode using current Raw sample.

[adoconnection]

Hi,
its a bit trickey, as System.Net.WebUtility has HtmlEncode but does not have HtmlAttributeEncode
it uses unsafe call of System.Web.Util.HttpEncoder.HtmlAttributeEncodeInternal
with following code

         internal static string HtmlAttributeEncode(string value)
        {
            if (string.IsNullOrEmpty(value) || HttpEncoder.IndexOfHtmlAttributeEncodingChars(value, 0) == -1)
                return value;
            StringWriter output = new StringWriter((IFormatProvider)CultureInfo.InvariantCulture);
            HttpEncoder.HtmlAttributeEncode(value, (TextWriter)output);
            return output.ToString();
        }

        internal static void HtmlAttributeEncode(string value, TextWriter output)
        {
            if (value == null)
                return;
            if (output == null)
                throw new ArgumentNullException(nameof(output));
            HttpEncoder.HtmlAttributeEncodeInternal(value, output);
        }

        private static unsafe void HtmlAttributeEncodeInternal(string s, TextWriter output)
        {
            int num1 = HttpEncoder.IndexOfHtmlAttributeEncodingChars(s, 0);
            if (num1 == -1)
            {
                output.Write(s);
            }
            else
            {
                int num2 = s.Length - num1;
                IntPtr num3;
                if (s == null)
                {
                    num3 = IntPtr.Zero;
                }
                else
                {
                    fixed (char* chPtr = &s.GetPinnableReference())
                        num3 = (IntPtr)chPtr;
                }
                char* chPtr1 = (char*)num3;
                while (num1-- > 0)
                    output.Write(*chPtr1++);
                while (num2-- > 0)
                {
                    char ch = *chPtr1++;
                    if (ch <= '<')
                    {
                        if (ch <= '&')
                        {
                            if (ch != '"')
                            {
                                if (ch == '&')
                                {
                                    output.Write("&amp;");
                                    continue;
                                }
                            }
                            else
                            {
                                output.Write("&quot;");
                                continue;
                            }
                        }
                        else if (ch != '\'')
                        {
                            if (ch == '<')
                            {
                                output.Write("&lt;");
                                continue;
                            }
                        }
                        else
                        {
                            output.Write("&#39;");
                            continue;
                        }
                        output.Write(ch);
                    }
                    else
                        output.Write(ch);
                }
                // ISSUE: fixed variable is out of scope
                // ISSUE: __unpin statement
                __unpin(chPtr);
            }
        }

I'm surprised they use unsafe in this function. I think we should upldate this code to safe calls and include in RazorEngineCore.

HtmlEncode already uses WebUtility.HtmlEncode

internal static string HtmlEncode(string value) => !string.IsNullOrEmpty(value) ? WebUtility.HtmlEncode(value) : value;

        internal static void HtmlEncode(string value, TextWriter output)
        {
            if (output == null)
                throw new ArgumentNullException(nameof(output));
            output.Write(WebUtility.HtmlEncode(value));
        }

[kinguru]

Thank you, currently I'd used your library without Raw, so assuming all are raw. But looking forward for updates.