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In Windows you cannot write to an executable file while it is still running, because the file is locked by the file system. Therefore a running application can never delete or update itself without the help of another process that does the actual work. However, this rule doesn't apply to Batch-scripts. They are interpreted line by line by cmd.exe and can delete themselves. This post demonstrates a simple trick how you can use this fact to generate a temporary self-removing Batch-script in C# to update your application. read more...