regular expression in c#

[mimranp]

Hi
i wants that user can only input 00 or 10 or 11 or 01 or 1n .
any character other than above explained not allowed.
how can i make regular expression for this using c#
plz help

[cloud255]

What does the 'n' represent?

[r035198x]

What have you tried so far?

[mimranp]

regular expression in c#

Hi
i wants that user can only input 00 or 10 or 11 or 01 or 1n .
any character other than above explained not allowed.
how can i make regular expression for this using c#
plz help ]

1 or 0 are digit and n is character

[Plater]

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