# Counter
The `Counter` class provides methods to attempt conversion of a `CharSpan` value into a string representation of supported types.
Supported types include
such as `Guid`, `DateTimeOffset`, `DateTime`, and, `DateOnly` and `TimeOnly`.
It handles matching equivalent values and assigning a number to each match. It is used by [Scrubbers](/docs/scrubbers.md).
## TryConvert
Takes a CharSpan and attempts to parse it to one of the supported types, then return the tokenized scrubbed value for that value.
One example usage is inside a custom scrubber:
```cs
[Fact]
public Task CounterTryConvert()
{
var settings = new VerifySettings();
settings.AddScrubber((builder, counter) =>
{
var values = builder.ToString().Split();
builder.Clear();
foreach (var value in values)
{
if (counter.TryConvert(value, out var result))
{
builder.Append(result);
}
else
{
builder.Append(value);
}
builder.Append(' ');
}
});
return Verify("The user with id c9cb98bf-3def-415e-a009-7d58055f5ffc was created on 2022-10-12", settings);
}
```
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Results in:
```txt
The user with id Guid_1 was created on DateTime_1
```
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