System.Globalization.EncodingTable.GetCodePageDataItem C# (CSharp) Метод

        unsafe internal static CodePageDataItem GetCodePageDataItem(int codepage) {
            CodePageDataItem dataItem;
            
            //Look up the item in the hashtable.
            dataItem = (CodePageDataItem)hashByCodePage[codepage];
            
            //If we found it, return it.
            if (dataItem!=null) {
                return (dataItem);
            }
    
            //If we didn't find it, try looking it up now.
            //If we find it, add it to the hashtable.
            //This is a linear search, but we probably won't be doing it very often.
            //
            int i = 0;
            int data;
            while ((data = codePageDataPtr[i].codePage) != 0) {
                if (data==codepage) {
                    dataItem = new CodePageDataItem(i);
                    hashByCodePage[codepage]=dataItem;
                    return (dataItem);
                }
                i++;
            }
            //Nope, we didn't find it.
            return (null);
        }