c# - Cannot add 1 to LastIndexOf() method -

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i have method gets substring based on last occurrence of forward slash character.

path.substring(path.lastindexof('/'), path.length - path.lastindexof('/') )

given string the/quick/brown/fox, substring result of /fox. rid of forward slash character such fox result.

i try add 1 lastindexof() method i'm getting argumentoutofrangeexception.

path.substring(path.lastindexof('/') + 1, path.length - path.lastindexof('/'))

the lastindexof() method returns int, why adding 1 cause error?

have considered simpler string.split?

var str = "the/quick/brown/fox"; var result = str.split('/').last();  //result = "fox"

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