System.Runtime.Serialization.Json.XmlJsonWriter.CheckText C# (CSharp) Method

        private void CheckText(JsonNodeType nextNodeType)
        {
            if (IsClosed)
            {
                ThrowClosed();
            }
            if (_depth == 0)
            {
                throw new InvalidOperationException(SR.XmlIllegalOutsideRoot);
            }

            if ((nextNodeType == JsonNodeType.StandaloneText) &&
                (_nodeType == JsonNodeType.QuotedText))
            {
                throw new XmlException(SR.JsonCannotWriteStandaloneTextAfterQuotedText);
            }
        }