如何将 Sum() 等 linq 函数与动态变量一起使用

Question

Type t = Type.GetType(obj.ToString());                 
PropertyInfo p = t.GetProperty("Test");
dynamic kk =  p.GetValue(obj, null);

在此，Test 是一个 int 列表。我需要从 int 列表中获取所有值的总和，即 kk。

Answer 1

// Type t = Type.GetType(obj.ToString());
Type t = obj.GetType(); // You might be able to replace the above line with this, simpler verison.
PropertyInfo p = t.GetProperty("Test");
object kk =  p.GetValue(obj, null);
int Sum = (kk as List<int>).Sum();

Answer 2

var list = p.GetValue(obj, null) as IEnumerable<int>;

var result = list.Sum();