Case insensitive string search

.net, .net-3.5, c#, string

Solution

Take a look at the IndexOf method:

textTosearch.IndexOf("some", StringComparison.OrdinalIgnoreCase);

Other overloads of this method allow you to specify a start index and a number of characters to examine.

Problem

What is the quickest most efficient way to search text for words using non-casesensitive search. E.g here is my text to be searched : ``` string textTosearch = "Here is a paragraph or Some text. Here is some more text". ``` If I wanted to find the indexes of "Some" and "some", is there a .Net class that does this or would I need to use something like regular expressions. Your thoughts are much appreciated. I'm using visual studio 2008.

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