Hello,

Before sending to the web service class, the paramter string will be
encoded and decoded, and the CR was lost during the procedure. To get
around the issue, you can consider following ways;

1. When get the string in web service, search for LF in the string and
replace with LF+CR.
2. Before send the string to web service, change its encoding to Unicode.
For example:

Encoding ascii = Encoding.ASCII;
Encoding unicode = Encoding.Unicode;

byte[] asciiBytes = ascii.GetBytes(MyString);
byte[] unicodeBytes = Encoding.Convert(ascii,unicode, asciiBytes);
           
char[] unicodeChars = new char[unicode.GetCharCount(unicodeBytes, 0,
unicodeBytes.Length)];
unicode.GetChars(unicodeBytes, 0, unicodeBytes.Length, unicodeChars, 0);
string unicodeString = new string(unicodeChars)

In this way, the string will be pass in Unicode encoding the CR won't be
lost.

On Web service side, we can use the Uncode string directly, or convert it
to ASCII back:

Encoding ascii = Encoding.ASCII;
Encoding unicode = Encoding.Unicode;

byte[] unicodeBytes = unicode.GetBytes(MyString);
byte[] asciiBytes = Encoding.Convert(unicode, ascii, unicodeBytes);
           
char[] asciiChars = new char[ascii.GetCharCount(asciiBytes, 0,
asciiBytes.Length)];
ascii.GetChars(asciiBytes, 0, asciiBytes.Length, asciiChars, 0);
string asciiString = new string(asciiChars);

Hope this help,

Luke