1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:
39:
40:
41:
42:
43:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.IO;

namespace MyWriter
{
    class MyWriter
    {
            private StreamWriter _sr = null;

            //Debug
            private static int _ctor_cnt = 0;
            private static int _dtor_cnt = 0;

            public MyWriter(string fileName)
            {
                _ctor_cnt++;
                _sr = new StreamWriter(fileName);
            }

            ~MyWriter()
            {
                _dtor_cnt++;


                Console.WriteLine("Ctor wurde {0} mal und Dtor {1} mal aufgerufen.", _ctor_cnt, _dtor_cnt);

                if (_sr != null)
                {
                    _sr.Close();
                }
            }

            public void Write(string theData)
            {
                _sr.WriteLine(theData);
                _sr.Flush();
            }
    }
}                    

1:
2:
3:
4:
5:

private void butMyWriterTest_Click(object sender, EventArgs e)
        {
            MyWriter mw = new MyWriter("C:\\temp\\mw.txt");
            mw.Write("Das soll eine Zeile werden.");
        }                    

1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:

            #region IDisposable Member

            public void Dispose()
            {
                if (_sr != null )
                {
                    // implicite call of Dispose(true)
                    _sr.Close();
                }

                Console.WriteLine("Object disposed.");               

                // Indicate that the instance has been disposed.
                _sr = null;

                GC.SuppressFinalize(this);
            }

            #endregion