How can I check the input if it's nearly same or not? [duplicate]

Question

Possible Duplicate:
Are there any Fuzzy Search or String Similarity Functions libraries written for C#?

I need to check the similarity of input value -which one user entered- to our records.

12345 vs 1234
12345 vs 13245
Robert vs Robret

etc...

In short; I need to calculate the similarity and tolerate the input in some ratio...

Answer 1

The Levenshtein distance is a string similarity algorithm you could use.

Answer 2

Google shows me this