System.Text.Encoding.GetEncodingCodePage C# (CSharp) Method

        private static Encoding GetEncodingCodePage(int CodePage)
        {
            // Single Byte or Double Byte Code Page? (0 if not found)
            int i = BaseCodePageEncoding.GetCodePageByteSize(CodePage);
            if (i == 1) return new SBCSCodePageEncoding(CodePage);
            else if (i == 2) return new DBCSCodePageEncoding(CodePage);

            // Return null if we didn't find one.
            return null;
        }