(C#)Encoding.

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Encoding.GetEncoding(936)).Contains(@"这是简体中文")

在.NET的世界里，string永远是unicode，所以通过读取TXT文件的每行，然后来判断其内容时，需要进行解码。

foreach (string line in File.ReadAllLines(“D:\\test.txt"))
{
　　Console.writeline (" {0}" + line);
}

具体编码参考MSDN. Encoding类

http://msdn.microsoft.com/zh-cn/library/system.text.encoding(v=vs.100).aspx

Windows Locale Codes Sorted by Codepage

As defined by Microsoft, a locale is either a language or a language in combination with a country. SeeMicrosoft definitions of locale.

CLICK one of the Column Titles to sort the table by that item.

Language (Locale)	LCID Decimal	LCID Hexade.	Codepage	Country code
Telugu	1098	044a	0	IND
Gujarati	1095	0447	0	IND
Punjabi	1094	0446	0	IND
Sanskrit	1103	044f	0	IND
Konkani	1111	0457	0	IND
Syriac	1114	045a	0	SYR
Kannada	1099	044b	0	IND
Marathi	1102	044e	0	IND
Divehi	1125	0465	0	MDV
Armenian	1067	042b	0	ARM
Hindi	1081	0439	0	IND
Georgian	1079	0437	0	GEO
Tamil	1097	0449	0	IND
Thai	1054	041e	874	THA
Japanese	1041	0411	932	JPN
Chinese (PRC)	2052	0804	936	CHN
Chinese (Singapore)	4100	1004	936	SGP
Korean	1042	0412	949	KOR
Chinese (Macau S.A.R.)	5124	1404	950	MCO
Chinese (Hong Kong S.A.R.)	3076	0c04	950	HKG
Chinese (Taiwan)	1028	0404	950	TWN
Romanian	1048	0418	1250	ROM
Slovenian	1060	0424	1250	SVN
Hungarian	1038	040e	1250	HUN
Slovak	1051	041b	1250	SVK
Polish	1045	0415	1250	POL
Albanian	1052	041c	1250	ALB
Serbian (Latin)	2074	081a	1250	SPB
Croatian	1050	041a	1250	HRV
Czech	1029	0405	1250	CZE
Mongolian (Cyrillic)	1104	0450	1251	MNG
FYRO Macedonian	1071	042f	1251	MKD
Uzbek (Cyrillic)	2115	0843	1251	UZB
Ukrainian	1058	0422	1251	UKR
Azeri (Cyrillic)	2092	082c	1251	AZE
Tatar	1092	0444	1251	RUS
Kazakh	1087	043f	1251	KAZ
Belarusian	1059	0423	1251	BLR
Kyrgyz (Cyrillic)	1088	0440	1251	KGZ
Bulgarian	1026	0402	1251	BGR
Serbian (Cyrillic)	3098	0c1a	1251	SPB
Russian	1049	0419	1251	RUS
English (Jamaica)	8201	2009	1252	JAM
French (Canada)	3084	0c0c	1252	CAN
French (France)	1036	040c	1252	FRA
French (Luxembourg)	5132	140c	1252	LUX
English (New Zealand)	5129	1409	1252	NZL
English (Ireland)	6153	1809	1252	IRL
Dutch (Netherlands)	1043	0413	1252	NLD
English (Caribbean)	9225	2409	1252	CAR
French (Switzerland)	4108	100c	1252	CHE
English (Canada)	4105	1009	1252	CAN
Galician	1110	0456	1252	ESP
English (Belize)	10249	2809	1252	BLZ
German (Austria)	3079	0c07	1252	AUT
French (Monaco)	6156	180c	1252	MCO
English (Zimbabwe)	12297	3009	1252	ZWE
Basque	1069	042d	1252	ESP
Dutch (Belgium)	2067	0813	1252	BEL
French (Belgium)	2060	080c	1252	BEL
Finnish	1035	040b	1252	FIN
Faroese	1080	0438	1252	FRO
German (Germany)	1031	0407	1252	DEU
English (Australia)	3081	0c09	1252	AUS
English (United States)	1033	0409	1252	USA
English (United Kingdom)	2057	0809	1252	GBR
Catalan	1027	0403	1252	ESP
English (Trinidad)	11273	2c09	1252	TTO
English (South Africa)	7177	1c09	1252	ZAF
Danish	1030	0406	1252	DNK
English (Philippines)	13321	3409	1252	PHL
Spanish (Paraguay)	15370	3c0a	1252	PRY
Spanish (Colombia)	9226	240a	1252	COL
Spanish (Costa Rica)	5130	140a	1252	CRI
Spanish (Dominican Republic)	7178	1c0a	1252	DOM
Spanish (Ecuador)	12298	300a	1252	ECU
Spanish (El Salvador)	17418	440a	1252	SLV
Spanish (Guatemala)	4106	100a	1252	GTM
Spanish (Honduras)	18442	480a	1252	HND
Spanish (International Sort)	3082	0c0a	1252	ESP
Spanish (Chile)	13322	340a	1252	CHL
Spanish (Nicaragua)	19466	4c0a	1252	NIC
Spanish (Mexico)	2058	080a	1252	MEX
Spanish (Peru)	10250	280a	1252	PER
Spanish (Puerto Rico)	20490	500a	1252	PRI
Spanish (Traditional Sort)	1034	040a	1252	ESP
Spanish (Uruguay)	14346	380a	1252	URY
Spanish (Venezuela)	8202	200a	1252	VEN
Swahili	1089	0441	1252	KEN
Swedish	1053	041d	1252	SWE
Swedish (Finland)	2077	081d	1252	FIN
German (Liechtenstein)	5127	1407	1252	LIE
Afrikaans	1078	0436	1252	ZAF
Spanish (Panama)	6154	180a	1252	PAN
German (Luxembourg)	4103	1007	1252	LUX
Spanish (Bolivia)	16394	400a	1252	BOL
German (Switzerland)	2055	0807	1252	CHE
Icelandic	1039	040f	1252	ISL
Indonesian	1057	0421	1252	IDN
Italian (Italy)	1040	0410	1252	ITA
Italian (Switzerland)	2064	0810	1252	CHE
Norwegian (Nynorsk)	2068	0814	1252	NOR
Spanish (Argentina)	11274	2c0a	1252	ARG
Portuguese (Brazil)	1046	0416	1252	BRA
Norwegian (Bokmal)	1044	0414	1252	NOR
Malay (Malaysia)	1086	043e	1252	MYS
Malay (Brunei Darussalam)	2110	083e	1252	BRN
Portuguese (Portugal)	2070	0816	1252	PRT
Greek	1032	0408	1253	GRC
Uzbek (Latin)	1091	0443	1254	UZB
Azeri (Latin)	1068	042c	1254	AZE
Turkish	1055	041f	1254	TUR
Hebrew	1037	040d	1255	ISR
Arabic (Algeria)	5121	1401	1256	DZA
Arabic (Bahrain)	15361	3c01	1256	BHR
Arabic (Yemen)	9217	2401	1256	YEM
Arabic (Egypt)	3073	0c01	1256	EGY
Arabic (Iraq)	2049	0801	1256	IRQ
Arabic (Jordan)	11265	2c01	1256	JOR
Arabic (Kuwait)	13313	3401	1256	KWT
Arabic (Lebanon)	12289	3001	1256	LBN
Arabic (Libya)	4097	1001	1256	LBY
Arabic (Morocco)	6145	1801	1256	MAR
Arabic (Oman)	8193	2001	1256	OMN
Arabic (Qatar)	16385	4001	1256	QAT
Arabic (Saudi Arabia)	1025	0401	1256	SAU
Arabic (Syria)	10241	2801	1256	SYR
Arabic (U.A.E.)	14337	3801	1256	ARE
Farsi	1065	0429	1256	IRN
Urdu	1056	0420	1256	PAK
Arabic (Tunisia)	7169	1c01	1256	TUN
Estonian	1061	0425	1257	EST
Latvian	1062	0426	1257	LVA
Lithuanian	1063	0427	1257	LTU
Vietnamese	1066	042a	1258	VNM

This table was generated from information at List of Locale IDs and Language Groups for Microsoft Windows 2000

Definitions

Locale: A collection of language-related, user-preference information represented as a list of values. (Reference)

Locale ID (LCID): A 32-bit value defined by Microsoft Windows that consists of a language ID, sort ID, and reserved bits that identify a particular language.

Codepage: "An ordered set of characters in which a numeric index (code point values) is associated with each character. The first 128 characters of each codepage are functionally the same and include all characters needed to type English text. The upper 128 characters of OEM and ANSI codepages contain characters used in a language or group of languages (Taken from Related resources below)".

IANA encoding	Java Canonical Name	Language	Comment
UTF-8	UTF8	8bit Universal character set
UTF-16	UTF-16	16bit Universal character set
US-ASCII	ASCII	American Standard Code for Information Interchange
windows-1250	Cp1250	Eastern European (Albanian, Croatian, Czech, English, German, Hungarian, Latin, Polish, Romanian, Slovak, Slovenian, Serbian)	Windows encoding
windows-1251	Cp1251	Eastern European (Cyrillic-based: Bulgarian, Byelorussian, Macedonian, Russian, Serbian, Ukrainian	Windows encoding
windows-1252	Cp1252	Western European (Albanian, Basque, Breton, Catalan, Danish, Dutch, English, Faeroese, Finnish, French, German, Greenlandic, Icelandic, Irish Gaelic, Italian, Latin, Luxemburgish, Norwegian, Portuguese, Rhaeto-Romanic, Scottish Gaelic, Spanish, Swedish)	Windows encoding
windows-1253	Cp1253	Greek	Windows encoding
windows-1254	Cp1254	Turkish	Windows encoding
windows-1255	Cp1255	Hebrew	Windows encoding
windows-1256	Cp1256	Arabic	Windows encoding
windows-1257	Cp1257	Baltic	Windows encoding
windows-1258	Cp1258	Vietnamese	Windows encoding
ISO-8859-1	ISO8859_1	Western European (Albanian, Basque, Breton, Catalan, Danish, Dutch, English, Faeroese, Finnish, French, German, Greenlandic, Icelandic, Irish Gaelic, Italian, Latin, Luxemburgish, Norwegian, Portuguese, Rhaeto-Romanic, Scottish Gaelic, Spanish, Swedish)	Euro Symbol is not supported
ISO-8859-2	ISO8859_2	Eastern European (Albanian, Croatian, Czech, English, German, Hungarian, Latin, Polish, Romanian, Slovak, Slovenian, Serbian)	Euro Symbol is not supported
ISO-8859-3	ISO8859_3	Southeastern European (Afrikaans, Catalan, Dutch, English, Esperanto, German, Italian, Maltese, Spanish, Turkish)
ISO-8859-4	ISO8859_4	Northern European (Danish, English, Estonian, Finnish, German, Greenlandic, Latin, Latvian, Lithuanian, Norwegian, Sﾃ｡mi, Slovenian, Swedish)
ISO-8859-5	ISO8859_5	Eastern European (Cyrillic-based: Bulgarian, Byelorussian, Macedonian, Russian, Serbian, Ukrainian)
ISO-8859-6	ISO8859_6	Arabic
ISO-8859-7	ISO8859_7	Greek
ISO-8859-8	ISO8859_8	Hebrew
ISO-8859-9	ISO8859_9	Western European (Albanian, Basque, Breton, Catalan, Cornish, Danish, Dutch, English, Finnish, French, Frisian, Galician, German, Greenlandic, Irish Gaelic, Italian, Latin, Luxemburgish, Norwegian, Portuguese, Rhaeto-Romanic, Scottish Gaelic, Spanish, Swedish, Turkish)
ISO-8859-13	ISO8859_13	Baltic Rim (English, Estonian, Finnish, Latin, Latvian, Norwegian)
ISO-8859-15	ISO8859_15	Western European (Albanian, Basque, Breton, Catalan, Danish, Dutch, English, Faeroese, Finnish, French, German, Greenlandic, Icelandic, Irish Gaelic, Italian, Latin, Luxemburgish, Norwegian, Portuguese, Rhaeto-Romanic, Scottish Gaelic, Spanish, Swedish)	ISO-8859-1 with Euro symbol support
windows-31j	MS932	Japanese	Windows encoding
EUC-JP	EUC_JP	Japanese	EUC encoding used on Unix platform
Shift_JIS	SJIS	Japanese	Shift JIS, does not support MS external characters
ISO-2022-JP	ISO2022JP	Japanese	JIS X 0201, 0208, in ISO 2022 form, this is used for e-mail
x-mswin-936	MS936	Simplified Chinese	Windows encoding, This is not registered in IANA.
GB18030	GB18030	Simplified Chinese	PRC standard
x-EUC-CN	EUC_CN	Simplified Chinese	GB2312, EUC encoding
GBK	GBK	Simplified Chinese
x-windows-949	MS949	Korean	Windows encoding, this is not registered in IANA.
EUC-KR	EUC_KR	Korean	KS C 5601, EUC encoding
x-windows-950	MS950	Traditional Chinese	Windows encoding, this is not registered in IANA
x-MS950-HKSCS	MS950_HKSCS	Traditional Chinese with Hong Kong extensions	Windows encoding, this is not registered in IANA
x-EUC-TW	EUC_TW	Traditional Chinese	CNS11643 (Plane 1-3), EUC encoding, this is not registered in IANA
Big5	Big5	Traditional Chinese
Big5-HKSCS	Big5_HKSCS	Traditional Chinese	Big5 with Hong Kong extensions
TIS-620	TIS620	Thai