Type mismatch when serializing data class

I'm following [this example](

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) to serialize a data class. When I do so, I get this build error:
```
Type mismatch: inferred type is Data but SerializationStrategy<TypeVariable(T)> was expected
```

Here's my code:
```
import kotlinx.serialization.json.Json
import kotlinx.serialization.Serializable

@Serializable
data class Data(val a: Int, val str: String = "str")

fun main() {
println(Json.encodeToString(Data(42)))
}
```

Since I am using the @Serializable annotation, shouldn't I have the right data type? How can I serialize the data class?

I was using the wrong ```encodeToString()``` function. It has to be ```kotlinx.serialization.encodeToString```, not the one from ```kotlinx.serialization.json.Json```

Please check the imports.
The ones below come from kotlin serialization and needs just the string and the object respectively.

```
import kotlinx.serialization.decodeFromString
import kotlinx.serialization.encodeToString
```

The function that only requires the value parameter is implemented as an extension function, so you need to add import
```kotlin
import kotlinx.serialization.encodeToString
```
To make it clear: instead of
```kotlin
import kotlinx.serialization.json.Json
import kotlinx.serialization.Serializable
```
you must write
```kotlin
import kotlinx.serialization.json.Json
import kotlinx.serialization.Serializable
import kotlinx.serialization.encodeToString
```