Invoke Methods in C# Reflection

Create Entity Class

Create Entities folder and create new class named Student.cs as below:

namespace LearnAdvancedCSharpWithRealApps.Entities
{
	public class Student
	{
		public string Id { get; set; }
		public string Name { get; set; }
		public int Age { get; set; }

		public string Hello()
		{
			return "Hello " + Name;
		}

		public string Hi(string Message)
		{
			return "Hi " + Message;
		}

		public double Avg(double Math, double Physical, double Chemistry)
		{
			return (Math * 3 + Physical * 2 + Chemistry) / 6;
		}
	}
}				

Run Application

using LearnAdvancedCSharpWithRealApps.Entities;
using System;
using System.Reflection;

namespace LearnAdvancedCSharpWithRealApps
{
	class Program
	{
		static void Main(string[] args)
		{
			var student = new Student { 
				Id = "st01",
				Name = "Name 1",
				Age = 20
			};

			InvokeHelloMethod(student);

			InvokeHiMethod(student);

			InvokeAvgMethod(student);

			Console.ReadLine();
		}

		private static void InvokeHelloMethod(object obj)
		{
			Type type = obj.GetType();
			MethodInfo methodInfo = type.GetMethod("Hello", new Type[] { });
			string result = methodInfo.Invoke(obj, new object[] { }).ToString();
			Console.WriteLine(result);
		}

		private static void InvokeHiMethod(object obj)
		{
			Type type = obj.GetType();
			MethodInfo methodInfo = type.GetMethod("Hi", new Type[] { typeof(string) });
			string result = methodInfo.Invoke(obj, new object[] { "Name 2" }).ToString();
			Console.WriteLine(result);
		}

		private static void InvokeAvgMethod(object obj)
		{
			Type type = obj.GetType();
			MethodInfo methodInfo = type.GetMethod("Avg", new Type[] { typeof(double), typeof(double), typeof(double) });
			string result = methodInfo.Invoke(obj, new object[] { 6.5, 9.5, 10 }).ToString();
			Console.WriteLine(result);
		}
	}
}				

Output

Hello Name 1
Hi Name 2
8.08333333333333