System.IO.StringWriter.Write C# (CSharp) Méthode

        public override void Write(char value)
        {
            if (!_isOpen)
            {
                throw new ObjectDisposedException(null, SR.ObjectDisposed_WriterClosed);
            }

            _sb.Append(value);
        }

        /// <summary>
        /// Converts a timestamp  specified in seconds/nanoseconds to a string.
        /// </summary>
        /// <remarks>
        /// If the value is a normalized duration in the range described in <c>field_mask.proto</c>,
        /// <paramref name="diagnosticOnly"/> is ignored. Otherwise, if the parameter is <c>true</c>,
        /// a JSON object with a warning is returned; if it is <c>false</c>, an <see cref="InvalidOperationException"/> is thrown.
        /// </remarks>
        /// <param name="paths">Paths in the field mask</param>
        /// <param name="diagnosticOnly">Determines the handling of non-normalized values</param>
        /// <exception cref="InvalidOperationException">The represented field mask is invalid, and <paramref name="diagnosticOnly"/> is <c>false</c>.</exception>
        internal static string ToJson(IList<string> paths, bool diagnosticOnly)
        {
            var firstInvalid = paths.FirstOrDefault(p => !ValidatePath(p));
            if (firstInvalid == null)
            {
                var writer = new StringWriter();
#if DOTNET35
                var query = paths.Select(JsonFormatter.ToJsonName);
                JsonFormatter.WriteString(writer, string.Join(",", query.ToArray()));
#else
                JsonFormatter.WriteString(writer, string.Join(",", paths.Select(JsonFormatter.ToJsonName)));
#endif
                return writer.ToString();
            }
            else
            {
                if (diagnosticOnly)
                {
                    var writer = new StringWriter();
                    writer.Write("{ \"@warning\": \"Invalid FieldMask\", \"paths\": ");
                    JsonFormatter.Default.WriteList(writer, (IList)paths);
                    writer.Write(" }");
                    return writer.ToString();
                }
                else
                {
                    throw new InvalidOperationException($"Invalid field mask to be converted to JSON: {firstInvalid}");
                }
            }
        }