Cannot create a file when that file already exists

I am using Winforms, and I am trying to copy a file from one location to another. If a file with the same name is 开发者_Python百科already there, I want to overwrite it. But I get an error like "Cannot create a file when that file already exists."

I want to overwrite the file. What should I do? I tried File.copy instead of File.move, but I got the same error.

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File.Copy(source,destination,true) will overwrite destination if permissions allow. See the docs.

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have you tried File.Copy(src, dest, true). This might help overwriting the existing file.

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I had the same error. The destination should be the new filename, not the destination folder.

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Check the write permission is allowed for the folder contains the destination file.

Try the following:

System.IO.File.Copy(src, dst, true);

true if you want the existing file will be overwritten.

To change or set file permission click here