Invoke

using System;/*  j  a v  a2 s.c o m*/
using System.Text;
using System.Reflection;

class MainClass
{
    public static void Main ()
    {
        Type type = typeof(StringBuilder);

        Type[] argTypes = new Type[] { typeof(System.String), typeof(System.Int32) };

        ConstructorInfo cInfo = type.GetConstructor(argTypes);

        object[] argVals = new object[] { "Some string", 30 };

        // Create the object and cast it to StringBuilder.
        StringBuilder sb = (StringBuilder)cInfo.Invoke(argVals);

        Console.WriteLine(sb);
    }
}

using System;//from   j a  v  a2 s .  c  o  m
using System.Reflection;
using System.Windows.Forms;

public class Class1
{
    static void Main(string[] args)
    {
        Type type = typeof(MyClass);
        object o = Activator.CreateInstance(type);

        type.InvokeMember("Text", BindingFlags.SetProperty | BindingFlags.Instance | BindingFlags.Public, null, o, new object[] { "Windows Developer Magazine" });
        string text = (string)type.InvokeMember("Text", BindingFlags.GetProperty | BindingFlags.Instance | BindingFlags.Public, null, o, new object[] { });
        Console.WriteLine(text);

    }
    private static void OnChanged(object sender, System.EventArgs e)
    {
        Console.WriteLine(((MyClass)sender).Text);
    }
}
public class MyClass
{
    private string text;

    public string Text
    {
        get { return text; }
        set
        {
            text = value;
            OnChanged();
        }
    }

    private void OnChanged()
    {
        if (Changed != null)
            Changed(this, System.EventArgs.Empty);
    }

    public event EventHandler Changed;
}

using System;/*from j  a  v  a  2  s . co m*/
using System.Reflection;

class Example
{
    static void Main()
    {
        Type t = typeof(String);

        MethodInfo substr = t.GetMethod("Substring", 
            new Type[] { typeof(int), typeof(int) });

        Object result = 
            substr.Invoke("Hello, World!", new Object[] { 7, 5 });
        Console.WriteLine("{0} returned \"{1}\".", substr, result);
    }
}