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Is there a way to compare the exact value of a string in C# [closed]

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So I made a simple c# file reader because I was bored and added an if statement to filter the results. But when I ran it, it gave me more results than I wanted. I was supposed to get
276, 2, and there was only one line inside the file with that value, but I got multiple. I checked the file and it had lines ending with the same value. I tried string.Equals(line, "276, 2") but it gave me the same results. I doubt there isn't something in c# that doesn't solve this issue.

You can use Regex, as it's mentioned in this issue
bool result = Regex.IsMatch(line, "\\b276, 2\\b");

All lists deleted [closed]

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I want to clear just birkatmankontur list but this code clears all lists in my program
katmankonturlari.Add(ii, birkatmankontur);
katmankonturlari.ToList();
birkatmankontur.Clear();

You probably want something like this:
// Create a shallow copy of birkatmankontur and add it into katmankonturlari
katmankonturlari.Add(ii, birkatmankontur.ToList());
// Clear original birkatmankontur;
// note, that katmankonturlari contains birkatmankontur's copy
birkatmankontur.Clear();

Get particular part(s) from String in C# [closed]

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I'm reading an email and performing a few operations.
In email it can't be in defined format as below,
Email formats:
Hi Team,
Please create 7025-45-365-14, 9851-98-524-12
5741-55-452-45
Thanks
MailItem.Body = "Hi Team,\r\n\r\n \r\n\r\nPlease create 7025-45-365-14, 9851-98-524-12\r\n\r\n5741-55-452-45.\r\n\r\n \r\n\r\nThanks\r\n"
My goal is to exact only the string parts into a loop one by one as below,
1st loop > 7025-45-365-14
2nd loop > 9851-98-524-12
3rd loop > 5741-55-452-45
I tried various logic but I can't extract as I need. Can someone help me?

To extract digits in that pattern (4-2-3-2)
foreach (var m in new Regex(#"\b(\d{4}-\d{2}-\d{3}-\d{2})\b").Matches(mail))
Console.WriteLine(m.Value);

Count items in MongoDB [closed]

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How do I get a count of all items in a Mongo collection, using the 2.x C# driver?
I'm trying to use CountAsync, which I need to pass in a filter. I don't want to filter - I want everything returned.

You can always pass the empty document in the method like this
db.collection.CountDocumentsAsync(new BsonDocument());

db.collection.count()
In C# you can use Count() on the cursor of your collection.

Try as below:
var mongo = new Mongo();
mongo.Connect();
var db = mongo.GetDatabase("DatabaseName");
var collection = db.GetCollection<Product>();
var totalCount= collection.Count();
you can check in the following URL
this url

Compare 2 text file contents in c# and remove same content [closed]

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Closed 9 years ago.
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I have 2 text file in C# say: File A & File B. I want to compare both file contents and if there is any content found in File A which is present in File B then i want to remove that content in File B .
So if is there any method in c# which can do this for me then please let me know?

If you want to compare the lines you could use this query:
var newLines = File.ReadLines(f2Path).Except(File.ReadLines(f1Path)).ToList();
File.WriteAllLines(f2Path, newLines);
Edit: according to your comment(s)
i want to exclude all lines from file2 where the id exists in file1
You could use this left-outer-join with LINQ:
var idInF2 = from f2Line in File.ReadLines(f2Path)
join f1Line in File.ReadLines(f1Path)
on f2Line.Split(',')[0].Trim() equals f1Line.Split(',')[0].Trim() into gj
from lineOne in gj.DefaultIfEmpty()
where lineOne == null
select f2Line;
File.WriteAllLines(f2Path, idInF2.ToList());
or you could use this more readable but less efficient approach using Contains:
var f1IDs = File.ReadLines(f1Path).Select(l => l.Split(',')[0].Trim());
var newLines = File.ReadLines(f2Path)
.Select(l => new { Line = l, ID = l.Split(',')[0].Trim() })
.Where(x => !f1IDs.Contains(x.ID))
.Select(x => x.Line).ToList();
File.WriteAllLines(f2Path, newLines);