Why does .NET add an additional slash to the already existent slashes in a path?

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The \\ is used because the \ is an escape character and is need to represent the a single \.

So it is saying treat the first \ as an escape character and then the second \ is taken as the actual value. If not the next character after the first \ would be parsed as an escaped character.

Here is a list of available escape characters:

\' - single quote, needed for character literals
\" - double quote, needed for string literals
\\ - backslash
\0 – Null 
\a - Alert 
\b - Backspace 
\f - Form feed 
\n - New line 
\r - Carriage return 
\t - Horizontal tab 
\v - Vertical quote 
\u - Unicode escape sequence for character 
\U - Unicode escape sequence for surrogate pairs. 
\x - Unicode escape sequence similar to "\u" except with variable length.

EDIT: To answer your question regarding Split, it should be no issue. Use Split as you would normally. The \\ will be treated as only the one character of \.

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