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.Net C# match a UK postcode with a regular expression

UK postcode Validation in C#

 [RegularExpression(@"^(([a-zA-Z]{1,2}[0-9][A-Z0-9]?|ASCN|STHL|TDCU|BBND|[BFS]IQQ|PCRN|TKCA) ?[0-9][a-zA-Z]{2}|BFPO ?[0-9]{1,4}|(KY[0-9]|MSR|VG|AI)[ -]?[0-9]{4}|[a-zA-Z]{2} ?[0-9]{2}|GE ?CX|GIR ?0A{2}|SAN ?TA1)$", ErrorMessage = "Invalid Post Code.")]
public string PostCode { get; set; }
Refer - https://en.wikipedia.org/wiki/Postcodes_in_the_United_Kingdom
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