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What are reflections in C#?
Reflection objects are used for obtaining type information at runtime. The classes that give access to the metadata of a running program are in the System.Reflection namespace.
The MemberInfo object of the System. Reflection class needs to be initialized for discovering the attributes associated with a class.
In the below example we have set the object of the target class −
System.Reflection.MemberInfo info = typeof(MyClass);
Here is the example −
Example
using System;
using System.Reflection;
[AttributeUsage(AttributeTargets.All)]
public class HelpAttribute : System.Attribute {
public readonly string Url;
public string Topic { // Topic is a named parameter
get {
return topic;
}
set {
topic = value;
}
}
public HelpAttribute(string url) { // url is a positional parameter
this.Url = url;
}
private string topic;
}
[HelpAttribute("Information on the class MyClass")]
class MyClass {
}
namespace AttributeAppl {
class Program {
static void Main(string[] args) {
System.Reflection.MemberInfo info = typeof(MyClass);
object[] attributes = info.GetCustomAttributes(true);
for (int i = 0; i < attributes.Length; i++) {
System.Console.WriteLine(attributes[i]);
}
Console.ReadKey();
}
}
}
Updated on: 20-Jun-2020
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