Ok, so I'm learning about generics and I'm trying to make this thing run, but its keep saying me the same error. Here's the code:
public static T Test<T>(MyClass myClass) where T : MyClass2
{
var result = default(T);
var resultType = typeof(T);
var fromClass = myClass.GetType();
var toProperties = resultType.GetProperties();
foreach (var propertyInfo in toProperties)
{
var fromProperty = fromClass.GetProperty(propertyInfo.Name);
if (fromProperty != null)
propertyInfo.SetValue(result, fromProperty, null );
}
return result;
}
This happens because default(T)
returns null
because T
represents a reference type. Default values for reference types are null
.
You could change your method to:
public static T Test<T>(MyClass myClass) where T : MyClass2, new()
{
var result = new T();
...
}
and then it will work as you want it to. Of course, MyClass2
and its descendants must have a parameterless constructor now.