System.Xml.XmlComplianceUtil.NonCDataNormalize C# (CSharp) Méthode

        public static string NonCDataNormalize( string value ) {
            int len = value.Length;
            if ( len <= 0 ) {
               return string.Empty;
            }

            int startPos = 0;
            StringBuilder norValue = null;
            XmlCharType xmlCharType = XmlCharType.Instance;
            while ( xmlCharType.IsWhiteSpace( value[startPos] ) ) {
                startPos++;
                if ( startPos == len ) {
                    return " ";
                }
            }

            int i = startPos;
            while ( i < len ) {
                if ( !xmlCharType.IsWhiteSpace( value[i] ) ) {
                    i++;
                    continue;
                }

                int j = i + 1;
                while ( j < len && xmlCharType.IsWhiteSpace( value[j] ) ) {
                    j++;
                }
                if ( j == len ) {
                    if ( norValue == null ) {
                        return value.Substring( startPos, i - startPos );
                    }
                    else {
                        norValue.Append( value, startPos, i - startPos );
                        return norValue.ToString();
                    }
                }
                if (j > i + 1 || value[i] != 0x20 ) {
                    if ( norValue == null ) {
                        norValue = new StringBuilder( len );
                    }
                    norValue.Append( value, startPos, i - startPos );
                    norValue.Append( (char)0x20 );
                    startPos = j;
                    i = j;
                }
                else {
                    i++;
                }
            }

            if ( norValue != null ) {
                if ( startPos < i ) {
                    norValue.Append( value, startPos, i - startPos );
                }
                return norValue.ToString();
            }
            else {
                if ( startPos > 0 ) {
                    return value.Substring( startPos, len - startPos );
                }
                else {
                    return value;
                }
            }
        }