System.Web.HttpException.WriteCompilationSource C# (CSharp) Method

		static void WriteCompilationSource (StringBuilder builder, StringBuilder longVersion, HtmlizedException e)
		{
			int [] a = e.ErrorLines;
			string s;
			int line = 0;
			int index = 0;
			int errline = 0;

			if (a != null && a.Length > 0)
				errline = a [0];

			int begin = errline - 2;
			int end = errline + 2;

			if (begin < 0)
				begin = 0;

			string tmp;			
			using (TextReader reader = new StringReader (e.FileText)) {
				while ((s = reader.ReadLine ()) != null) {
					line++;
					if (line < begin || line > end) {
						if (longVersion != null)
							longVersion.AppendFormat ("{0}: {1}\r\n", line, HtmlEncode (s));
						continue;
					}
				
					if (errline == line) {
						if (longVersion != null)
							longVersion.Append ("<span class=\"sourceErrorLine\">");
						builder.Append ("<span class=\"sourceErrorLine\">");
					}
					
					tmp = String.Format ("{0}: {1}\r\n", line, HtmlEncode (s));
					builder.Append (tmp);
					if (longVersion != null)
						longVersion.Append (tmp);
					
					if (line == errline) {
						builder.Append ("</span>");
						if (longVersion != null)
							longVersion.Append ("</span>");
						errline = (++index < a.Length) ? a [index] : 0;
					}
				}
			}			
		}