Example source generator output to deconstruct tuples from expressions

TupleDeconstruct.cs

using System.Data;

var dict = new Dictionary<string, object>() {
    { "name", "Marcus" },
    { "age", 44 },
};

var data = new DataTable();
data.Columns.Add("name", typeof(string));
data.Columns.Add("age", typeof(int));
var row = data.NewRow();
row["name"] = "David";
row["age"] = 30;

{
    (string name, int age) = dict.DeconstructNameAge();
    Console.WriteLine($"Dict: {name} {age}");
}

{
    (string name, int age) = row.DeconstructNameAge();
    Console.WriteLine($"Data: {name} {age}ish");
}

Console.ReadKey();

public static class Extensions
{
    public static (string, int) DeconstructNameAge(this Dictionary<string, object> dict, string key0 = "name", string key1 = "age")
    {
        return (Convert.ToString(dict[key0])!, Convert.ToInt32(dict[key1]));
    }

    public static (string, int) DeconstructNameAge(this DataRow row, string key0 = "name", string key1 = "age")
    {
        return (Convert.ToString(row[key0])!, Convert.ToInt32(row[key1]));
    }
}