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Compiler Error CS8210

A tuple may not contain a value of type 'void'.

Example

The following sample generates CS8210:

// CS8210.cs
void Method()
{
}

void Test()
{
    var x = ("something", Method());
}

Your method returns void, so that method doesn't return a value. You can't use a method that returns void for a data member of a tuple.

See also