Why is Text Mesh Pro SetText not working with ToString()?

The reason why TextMesh Pro's `SetText()` method might not work as expected when used directly with `ToString()` is often due to implicit conversions and the specific requirements of how TextMesh Pro handles text input.

Here's a breakdown of the common issues:

1. Implicit Conversions and Boxed Values:

- In C#, when you call `ToString()` on value types (like integers, floats, etc.), it can sometimes result in a boxed value. While it does convert the value to a string, TextMesh Pro's `SetText()` function is designed to handle `string` types directly. If the value passed is not a simple string, it might lead to unexpected results.

2. Formatting Issues:

- Directly using `ToString()` on certain types, especially floating-point numbers, can lead to formatting issues. The default output might not be in the exact format needed for display in TextMesh Pro. For example, it might have more decimal places than desired, or use the system's default number formatting.

3. Null or Empty Values:

- If the object you're calling `ToString()` on is `null` or represents an empty value in some cases, the resulting string might not be displayable in TextMesh Pro. Always ensure that the object you are calling `ToString()` on is not `null`.

4. TextMesh Pro's Text Input Requirements:

- `TextMesh Pro` might have specific requirements for text input, such as needing a proper string representation. Although `ToString()` technically returns a string, it may not always conform to `TextMesh Pro`'s expectations due to the way boxing and other internal mechanisms of `ToString()` can operate.

How to Fix it:

- Explicit String Conversion: Instead of relying solely on the implicit behavior of `ToString()`, explicitly convert your value types to strings using string interpolation or formatting.

Example:

int myInteger = 123;
float myFloat = 4.567f;

//Incorrect way (may cause issues)
// myTextMeshProComponent.SetText(myInteger.ToString());

//Correct ways
myTextMeshProComponent.SetText($"{myInteger}");
myTextMeshProComponent.SetText(myFloat.ToString("F2")); //Formats to 2 decimal places
myTextMeshProComponent.SetText(string.Format("{0}", myInteger));

- Use String Interpolation: String interpolation (using $"{variable}") can provide a cleaner way to convert variables to strings, this approach provides more control over the conversion process.

- Use String Formatting: Use `string.Format()` to achieve the necessary formatting before setting text with `SetText`.

- Ensure Non-Null Values: Ensure the value is not `null` before attempting any operations, using null checks or providing a default value if needed.

By understanding these subtle nuances, you can ensure TextMesh Pro receives text in a format it can process correctly, avoiding issues with `SetText()` and `ToString()` combination.

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