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Editorial Team
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Editorial Team
Asked: May 14, 20262026-05-14T01:22:57+00:00 2026-05-14T01:22:57+00:00

How can I write regular expression in C# to validate that the input does

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How can I write regular expression in C# to validate that the input does not contain double spaces? I am using Regular Expression Validation. However I do not know what is the Validation Expression to get the result.

"white snake"  : success
"white  snake" : fail
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  1. Editorial Team
    Editorial Team
    2026-05-14T01:22:57+00:00Added an answer on May 14, 2026 at 1:22 am

    Here you have an option for the regex

    ^((?!\s\s).)*$

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