Use Reflection to Dynamic Invoke a Method in a dll

We study a sample code below:

using System;
using System.Collections.Generic;
using System.Text;
using System.Reflection;

class Program
{
static void Main(string[] args)
{
string path = @"C:\WINDOWS\Microsoft.NET\Framework\" +
@"v2.0.50727\System.Web.dll";

// Get the Assembly from the file
Assembly webAssembly = Assembly.LoadFile(path);

// Get the type to the HttpUtility class
Type utilType = webAssembly.GetType("System.Web.HttpUtility");

// Get the static HtmlEncode and HtmlDecode methods
MethodInfo encode = utilType.GetMethod("HtmlEncode",
new Type[] { typeof(string) });
MethodInfo decode = utilType.GetMethod("HtmlDecode",
new Type[] { typeof(string) });
// Create a string to be encoded
string originalString =
"This is Sally & Jack's Anniversary ";
Console.WriteLine(originalString);

// encode it and show the encoded value
string encoded =
(string) encode.Invoke(null, new object[] { originalString });
Console.WriteLine(encoded);

// decode it to make sure it comes back right
string decoded =
(string) decode.Invoke(null, new object[] { encoded });
Console.WriteLine(decoded);
}
}

Notice in case we don't need to specify the object type, we can use the code below:

MethodInfo meth=hastType.GetMethod("Add"); //no type parameters
meth.Invoke(hashTable, new Object[]{"Hello","Hi"}); //use Invoke "Add" method to add the Object {"Hello","Hi"} to the hashTable.