HasInstanceAndStaticMethods.cs

using System;

namespace ConsoleApplication
{
    public class HasInstanceAndStaticMethods
    {
        public static void StaticMethod()
        {
            Console.WriteLine("Hello from static method");
        }
        public void InstanceMethod()
        {
            Console.WriteLine($"Type in instance method is {this.GetType().FullName} "); 
        }
        public void CallStaticMethodFromInstanceMethod()
        {
            Console.Write("Attempting to call static method from instance method...");
            StaticMethod();
            Console.WriteLine("... and it succeeded.");
        }
    }
    public class Program
    {
        public static void Main(string[] args)
        {
            HasInstanceAndStaticMethods.StaticMethod();
            var instance = new HasInstanceAndStaticMethods(); 
            instance.InstanceMethod();
            instance.CallStaticMethodFromInstanceMethod(); 
        }
    }
}

// Output:
// Type in instance method is ConsoleApplication.HasInstanceAndStaticMethods
// Attempting to call static method from instance method...Hello from static method
// ... and it succeeded.