Alternative solution to fix the issue

### Type of issue

Missing information

### Description

I more often replace a

```
if(!dictionary.ContainsKey(2)) {
dictionary.Add(2, "Hello World");
}
```

by a

```
dictionary[2] = "Hello World";
```

than a
```
dictionary.TryAdd(2, "Hello World");
```

This changes the behavior from first-wins to last-wins, but often that can be ignored e.g. as the expected behavior is not defined etc.

Maybe that alternative solution could also be mentioned in the description somewhere or even provides as alternative refactoring option.

### Page URL

https://learn.microsoft.com/en-us/dotnet/fundamentals/code-analysis/quality-rules/ca1864

### Content source URL

https://github.com/dotnet/docs/blob/main/docs/fundamentals/code-analysis/quality-rules/ca1864.md

### Document Version Independent Id

ff5bb003-dfd0-173b-6a4f-34012dd5f94d

### Article author

@gewarren

### Metadata

* ID: 78f3e28a-0823-42ea-d5d8-b1625b49babc
* Service: **dotnet-fundamentals**

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