1.Error143Could not copy "obj\Debug\LibrarySystem.exe" to "bin\Debug\LibrarySystem.exe". Exceeded retry count of 10. Failed. 2.Error144Unable to copy file "obj\Debug\LibrarySystem.exe" to "bin\Debug\LibrarySystem.exe". The process cannot access the file 'bin\Debug\LibrarySystem.exe' because it is being used by another process.
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