C＃-接受通用参数，使用反射来修改属性，然后返回通用参数

Question

I'm trying to take in a generic argument, manipulate the properties of it via Reflection, and then return the generic type with the modified properties.

public IEnumerable<T> GenerateTest()
{
     var type = typeof(T);

foreach (var field in type.GetProperties())
                {
               // Modify / Set properties on variable type

                }

// How do I return object T with the parameters that I modified in the iteration above?
}

Answer 1

To be able to create a new T object, you need to add the new() constraint to the type parameter:

class MyClass<T> where T : new()
{
    public IEnumerable<T> GenerateTest()
    {

Then you can create a new T object and set its properties:

        var obj = new T();

        foreach (var field in typeof(T).GetProperties())
        {
            field.SetValue(obj, ...);
        }

Because your method returns an IEnumerable<T> , you can't return your T object directly but need to wrap in a collection:

        var list = new List<T>();
        list.Add(obj);
        return list;
    }
}