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Compiler Error CS1680 

Error Message

Invalid reference alias option: 'alias=' -- missing filename.

This error occurs when you use the alias feature with the /reference compiler option without specifying a valid file name.

The following sample generates CS1680.

// CS1680.cs
// compile with: /reference:alias=
// CS1680 expected
// To resolve, specify the name of a file with an assembly manifest
class MyClass {}

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