Appboy.Utilities.Json.Serializer.SerializeString C# (CSharp) Method

            private void SerializeString(string str)
            {
                this.builder.Append('\"');

                char[] charArray = str.ToCharArray();
                foreach (var c in charArray)
                {
                    switch (c)
                    {
                        case '"':
                            this.builder.Append("\\\"");
                            break;
                        case '\\':
                            this.builder.Append("\\\\");
                            break;
                        case '\b':
                            this.builder.Append("\\b");
                            break;
                        case '\f':
                            this.builder.Append("\\f");
                            break;
                        case '\n':
                            this.builder.Append("\\n");
                            break;
                        case '\r':
                            this.builder.Append("\\r");
                            break;
                        case '\t':
                            this.builder.Append("\\t");
                            break;
                        default:
                            int codepoint = Convert.ToInt32(c);
                            if ((codepoint >= 32) && (codepoint <= 126))
                            {
                                this.builder.Append(c);
                            }
                            else
                            {
                                this.builder.Append("\\u" + Convert.ToString(codepoint, 16).PadLeft(4, '0'));
                            }

                            break;
                    }
                }

                this.builder.Append('\"');
            }