assign null

//IL，區域變數，先將Delegate宣告成null，用+=
	internal class Class1
	{
		public delegate void MyDelegate();
		public void MyTest()
		{
			Class1.MyDelegate mydelegate = null;
			mydelegate = (Class1.MyDelegate)Delegate.Combine(mydelegate, delegate
			{
				Console.WriteLine("test");
			}
			);
			mydelegate();
		}
	}

global

//IL，宣告在全域，用+=

	internal class Class1
	{
		public delegate void MyDelegate();
		private Class1.MyDelegate mydelegate;
		public void MyTest()
		{
			this.mydelegate = (Class1.MyDelegate)Delegate.Combine(this.mydelegate, delegate
			{
				Console.WriteLine("test");
			}
			);
			this.mydelegate();
		}
	}

local

//IL，區域變數 用=
	internal class Class1
	{
		public delegate void MyDelegate();
		public void MyTest()
		{
			Class1.MyDelegate mydelegate = delegate
			{
				Console.WriteLine("test");
			}
			;
			mydelegate();
		}
	}