System.Data.ProviderBase.FieldNameLookup.LinearIndexOf C# (CSharp) Method

        private int LinearIndexOf(string fieldName, CompareOptions compareOptions)
        {
            CompareInfo compareInfo = _compareInfo;
            if (null == compareInfo)
            {
                if (-1 != _defaultLocaleID)
                {
                    compareInfo = CompareInfo.GetCompareInfo(_defaultLocaleID);
                }
                if (null == compareInfo)
                {
                    compareInfo = CultureInfo.InvariantCulture.CompareInfo;
                }
                _compareInfo = compareInfo;
            }
            int length = _fieldNames.Length;
            for (int i = 0; i < length; ++i)
            {
                if (0 == compareInfo.Compare(fieldName, _fieldNames[i], compareOptions))
                {
                    _fieldNameLookup[fieldName] = i; // add an exact match for the future
                    return i;
                }
            }
            return -1;
        }