How do I copy the contents of one stream to another?

Question

What is the best way to copy the contents of one stream to another? Is there a standard utility method for this?

Answer 1

.NET Framework 4 introduce new "CopyTo" method of Stream Class of System.IO namespace. Using this method we can copy one stream to another stream of different stream class.

Here is example for this.

    FileStream objFileStream = File.Open(Server.MapPath("TextFile.txt"), FileMode.Open);
    Response.Write(string.Format("FileStream Content length: {0}", objFileStream.Length.ToString()));

    MemoryStream objMemoryStream = new MemoryStream();

    // Copy File Stream to Memory Stream using CopyTo method
    objFileStream.CopyTo(objMemoryStream);
    Response.Write("

");
    Response.Write(string.Format("MemoryStream Content length: {0}", objMemoryStream.Length.ToString()));
    Response.Write("

");