Instantiate an object with a runtime-determined type

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There are several ways you can create an object of a certain type on the fly, one is:

// determine type here
var type = typeof(MyClass);

// create an object of the type
var obj = (MyClass)Activator.CreateInstance(type);

And you’ll get an instance of MyClass in obj.

Another way is to use reflection:

// get type information
var type = typeof(MyClass);

// get public constructors
var ctors = type.GetConstructors(BindingFlags.Public);

// invoke the first public constructor with no parameters.
var obj = ctors[0].Invoke(new object[] { });

And from one of ConstructorInfo returned, you can “Invoke()” it with arguments and get back an instance of the class as if you’ve used a “new” operator.

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