Dispose的实现，Com非托管对象的释放

public class XlsBase: IDisposable { protected Application m_xlsApp; private bool isDisposed = false; public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } protected virtual void Dispose(bool disposing) { if (!isDisposed) { if (disposing) { //执行清除托管资源的操作 } //执行清除非托管资源的操作 if (m_xlsApp != null) { m_xlsApp.Quit(); System.Runtime.InteropServices.Marshal.ReleaseComObject(m_xlsApp); m_xlsApp = null; } } } public XlsBase() { m_xlsApp = new Application(); } }

private void button1_Click(object sender, EventArgs e) { using (XlsBase xlsbase = new XlsBase()) { int i = 0; } }