System.ComponentModel.CultureInfoConverter.ConvertFrom C# (CSharp) Method

        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) {

            if (value is string) {
                string text = (string)value;
                CultureInfo retVal = null;

                CultureInfo currentUICulture = Thread.CurrentThread.CurrentUICulture;

                if (culture != null && culture.Equals(CultureInfo.InvariantCulture)) {
                    Thread.CurrentThread.CurrentUICulture = culture;
                }

                try {
                    // Look for the default culture info.
                    //
                    if (text == null || text.Length == 0 || string.Compare(text, DefaultCultureString, true, CultureInfo.CurrentCulture) == 0) {
                        retVal = CultureInfo.InvariantCulture;
                    }

                    // Now look in our set of installed cultures.
                    //
                    if (retVal == null) {
                        ICollection values = GetStandardValues(context);
                        IEnumerator e = values.GetEnumerator();
                        while (e.MoveNext()) {
                            CultureInfo info = (CultureInfo)e.Current;
                            if (info != null && string.Compare(info.DisplayName, text, true, CultureInfo.CurrentCulture) == 0) {
                                retVal = info;
                                break;
                            }
                        }
                    }

                    // Now try to create a new culture info from this value
                    //
                    if (retVal == null) {
                        try {
                            retVal = new CultureInfo(text);
                        }
                        catch {}
                    }

                    // Finally, try to find a partial match
                    //
                    if (retVal == null) {
                        text = text.ToLower(CultureInfo.CurrentCulture);
                        IEnumerator e = values.GetEnumerator();
                        while (e.MoveNext()) {
                            CultureInfo info = (CultureInfo)e.Current;
                            if (info != null && info.DisplayName.ToLower(CultureInfo.CurrentCulture).StartsWith(text)) {
                                retVal = info;
                                break;
                            }
                        }
                    }
                }

                finally {
                    Thread.CurrentThread.CurrentUICulture = currentUICulture;
                }
                
                // No good.  We can't support it.
                //
                if (retVal == null) {
                    throw new ArgumentException(SR.GetString(SR.CultureInfoConverterInvalidCulture, (string)value));
                }
                return retVal;
            }
            
            return base.ConvertFrom(context, culture, value);
        }