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Is there any way I can find a Unicode character's bidirectional character type in C#?
I want to look through the characters in a string and decide if they are all strong LTR, strong RTL, a mixture of strong LTR and neutral, etc.
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Bidirectional (BIDI) text results when texts of different direction orientation appear together. For example, English text is read from left to right. Arabic and Hebrew texts are read from right to left. If both English and Hebrew texts appear on the same line, the text is bidirectional.
The Unicode Bidirectional Algorithm is designed so that the use of explicit formatting characters can be equivalently represented by out-of-line information, such as stylesheet information or markup. Conflicts can arise if markup and explicitly formatting characters are both used in the same paragraph.
It can represent all 1,114,112 Unicode characters. Most C code that deals with strings on a byte-by-byte basis still works, since UTF-8 is fully compatible with 7-bit ASCII.
System.Globalization.CharUnicodeInfo.GetBidiCategory(ch) is your friend.
The problem is that the function is internal. This MichKap (RIP) blog post shows you how to call it using reflection.
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