Can't move file , because is used by another process - asp.net

Question

I have many files in one directory, My app, must move some files to another directory. When I did this, first time works fine, but after that I have a exception like:
System.IO.IOException: process cannot access the file because another process is using the file.
I close windows explorer, or any program, avoiding the use of the file, but the problem persists.
I move files in this way:
private void ExtractosRemover()
{
string dirOrigen = '\\' + #"\" + servidor + #"\" + "EEQ_" + User.Identity.Name.ToString() + #"\";
string dirDestin = '\\' + #"\" + servidor + #"\" + "FacturasMatch_" + User.Identity.Name.ToString() + #"\";
try
{
foreach (GridViewRow grd_Row in this.gvwExtractosMatch.Rows)
{
File.Move(System.IO.Path.Combine(dirOrigen, clean(grd_Row.Cells[7].Text) + ".xml"), dirDestin);
}
}
catch (FileNotFoundException)
{
}
catch (IOException ioex)
{
lbl_UbiDevMensaje.Text = string.Empty;
lbl_UbiDevMensaje.Text = ioex.ToString();
}
}
For the names of the files, I read a gridview, and I add the extensions.
I don't know what is happening,
Please, I hope somebody can help me.
Thanks in advance.
best regards

Answer 1

Solved,
Using server map
private void ExtractosRemover()
{
string dirOrigen = "~/" + "EEQ_" + User.Identity.Name.ToString() + "/";
string dirDestin = "~/" + "FacturasMatch_" + User.Identity.Name.ToString() + "/";
foreach (GridViewRow grd_Row in this.gvwExtractosMatch.Rows)
{
try
{
File.Move( //Mover xml
Server.MapPath(dirOrigen + clean(grd_Row.Cells[7].Text) + ".xml"),
Server.MapPath(dirDestin + clean(grd_Row.Cells[7].Text) + ".xml")
);
File.Move( //Mover pdf
Server.MapPath(dirOrigen + "RIDE_" + clean(grd_Row.Cells[7].Text) + ".pdf"),
Server.MapPath(dirDestin + "RIDE_" + clean(grd_Row.Cells[7].Text) + ".pdf")
);
}
catch (FileNotFoundException)
{ }
}
}