Useful regular expressions
Regex syntax is :
Regex re = new Regex("Regular Expression string",Regular Expression Options);
Regular Expression Options are options that we can use along with regular expression like RegexOptions.IgnoreCase or RegexOptions.Compiled
Here I am lisitng some Regular Expressions:
[a-zA-Z]* - Regular Expression to allow only charactors
[0-9]* - Regular Expression to allow only numbers
[a-zA-Z0-9]* - Regular Expression to allow only alphanumeric charactors
[0-9]*(\.[0-9]{1,2})? - Regular Expression to validate a float number with 1 or 2 decimal points
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