System.Xml.XmlReader.InternalReadContentAsString C# (CSharp) Method

        internal string InternalReadContentAsString()
        {
            string value = string.Empty;
            StringBuilder sb = null;
            do
            {
                switch (this.NodeType)
                {
                    case XmlNodeType.Attribute:
                        return this.Value;
                    case XmlNodeType.Text:
                    case XmlNodeType.Whitespace:
                    case XmlNodeType.SignificantWhitespace:
                    case XmlNodeType.CDATA:
                        // merge text content
                        if (value.Length == 0)
                        {
                            value = this.Value;
                        }
                        else
                        {
                            if (sb == null)
                            {
                                sb = new StringBuilder();
                                sb.Append(value);
                            }
                            sb.Append(this.Value);
                        }
                        break;
                    case XmlNodeType.ProcessingInstruction:
                    case XmlNodeType.Comment:
                    case XmlNodeType.EndEntity:
                        // skip comments, pis and end entity nodes
                        break;
                    case XmlNodeType.EntityReference:
                        if (this.CanResolveEntity)
                        {
                            this.ResolveEntity();
                            break;
                        }
                        goto default;
                    case XmlNodeType.EndElement:
                    default:
                        goto ReturnContent;
                }
            } while ((this.AttributeCount != 0) ? this.ReadAttributeValue() : this.Read());

        ReturnContent:
            return (sb == null) ? value : sb.ToString();
        }