How Can I Instantiate Generic Objects with Parameterized Constructors in C#?

Generic object instantiation with parameterized constructor in C#

In C#, it is possible to create instances of generic types with parameterized constructors. However, the provided code example provides a new parameterless constructor method for the base class, which is not always practical in real-world scenarios.

To solve this problem, one solution is to use the Activator class. The following code snippet demonstrates this approach:

<code class="language-C#">return (T)Activator.CreateInstance(typeof(T), new object[] { weight });</code>

This code uses the Activator.CreateInstance method to instantiate a new T type object. The typeof(T) expression returns a Type object of the generic type. The constructor is called by passing the required parameters as an array of objects.

It is important to note that the new() constraint on a generic type is only used to ensure that the compiler checks for the existence of a public parameterless constructor at compile time. The actual mechanism for instance creation is still the Activator class.

However, it is worth considering that relying on the Activator class may introduce a certain degree of code smell, and it is generally recommended to avoid such requirements in current versions of C#.

The above is the detailed content of How Can I Instantiate Generic Objects with Parameterized Constructors in C#?. For more information, please follow other related articles on the PHP Chinese website!