Microsoft.DocAsCode.Dfm.DfmCodeExtractorHelper.GetIndentLength C# (CSharp) Method

        public static int GetIndentLength(string s) => s.TakeWhile(c => AllowedIndentCharacters.Contains(c)).Count();
    }

        public Dictionary <string, DfmTagNameResolveResult> GetAll(string[] lines)
        {
            if (lines == null)
            {
                throw new ArgumentNullException(nameof(lines));
            }

            var snippetTags      = ResolveCodeSnippetTags(lines);
            var snippetTagGroups = from tag in snippetTags
                                   group tag by tag.Name;

            var excludedLines = new HashSet <int>(from tagGroup in snippetTagGroups
                                                  from tag in tagGroup
                                                  select tag.Line);

            var result = new Dictionary <string, DfmTagNameResolveResult>();

            foreach (var snippetTagGroup in snippetTagGroups)
            {
                var    tagResolveResult = new DfmTagNameResolveResult();
                string tagName          = snippetTagGroup.Key;

                var startTags = (from tag in snippetTagGroup
                                 where tag.Type == CodeSnippetTagType.Start
                                 select tag.Line).ToList();

                var endTags = (from tag in snippetTagGroup
                               where tag.Type == CodeSnippetTagType.End
                               select tag.Line).ToList();

                if (startTags.Count == 1 && endTags.Count == 1)
                {
                    int startLine = startTags[0];
                    int endLine   = endTags[0];
                    if (startLine < endLine)
                    {
                        tagResolveResult.IsSuccessful  = true;
                        tagResolveResult.StartLine     = startLine + 1;
                        tagResolveResult.EndLine       = endLine - 1;
                        tagResolveResult.ExcludesLines = excludedLines;
                        tagResolveResult.IndentLength  = DfmCodeExtractorHelper.GetIndentLength(lines[startLine - 1]);
                    }
                    else
                    {
                        tagResolveResult.IsSuccessful = false;
                        tagResolveResult.ErrorMessage = $"Tag {tagName}'s start line '{startLine}' should be less than end line '{endLine}'";
                    }
                }
                else
                {
                    tagResolveResult.IsSuccessful = false;
                    tagResolveResult.ErrorMessage =
                        $"Tag {tagName} is not paired or occurred just more than once, details: ({startTags.Count} start lines, {endTags.Count} end lines)";
                }

                result.Add(tagName, tagResolveResult);
            }

            return(result);
        }