When you pass an argument to a ref parameter, that argument must already be set to some value.

Name: When you pass an argument to a ref parameter, that argument must already be set to some value.
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This is because a ref parameter is meant to modify the value of the argument that is passed to it, so there must already be a value for it to modify. If the argument is not set to a value before being passed to a ref parameter, it may result in unexpected behavior or errors.

When You Pass an Argument to a Ref Parameter, That