GetRidOfOutParams.cs

public class TryParseInt32Result
{
    private readonly bool _isSuccessful;
    private readonly int _value;
    
    public TryParseInt32Result(bool isSuccessful, int value)
    {
        _isSuccessful = isSuccessful;
        _value = value;
    }
    
    public bool IsSuccessful
    {
        get { return _isSuccessful; }
    }
    
    public int Value
    {
        get { return _value; }
    }
}

public static TryParseInt32Result TryParse(string str)
{
    int value; 
    bool isSuccessful = TryParse(str, out value);
    return new TryParseInt32Result(isSuccessful, value);
}

// Usage:
var result = System.Int32.TryParse("123");
if (result.IsSuccessful)
{
    var theValue = result.Value;
}