c# – 关闭FileStream会关闭StreamReader吗？

如果我使用FileStream创建StreamReader,当我关闭FileStream时StreamReader会关闭还是我还需要关闭StreamReader？

public void ReadFile()
{
    var file = new FileStream("c:\file.txt",FileMode.Open,FileAccess.Read);
    var reader = new StreamReader(file);

    try
    {
        txtFile.Text = reader.ReadToEnd();
    }
    catch (Exception)
    {
        throw;
    }
    finally
    {
        file.Close();
    }
}

解决方法

基本上是的.您实际上不必关闭StreamReader.如果这样做,它所做的就是关闭底层流.

@Bruno对关闭最外层包装器提出了一个很好的观点.最好关闭最外层的流并让它关闭底层流,以确保正确释放所有资源.

来自Reflector ……

public class StreamReader : TextReader
{
    public override void Close()
    {
        this.dispose(true);
    }

    protected override void dispose(bool disposing)
    {
        try
        {
            if ((this.Closable && disposing) && (this.stream != null))
            {
                this.stream.Close();
            }
        }
        finally
        {
            if (this.Closable && (this.stream != null))
            {
                this.stream = null;
                this.encoding = null;
                this.decoder = null;
                this.byteBuffer = null;
                this.charBuffer = null;
                this.charPos = 0;
                this.charLen = 0;
                base.dispose(disposing);
            }
        }
    }
}