Build error while runing

Build error while runing

I am trying to run a code snippet multiple numbers of times in C#.Project
name is test.Initial number of times it's running properly but after that
i am getting the following build error."Error 1 Unable to copy file
"obj\x86\Debug\test.exe" to "bin\Debug\test.exe". The process cannot
access the file 'bin\Debug\test.exe' because it is being used by another
process.test". How can I get rid of this error.