C# : How do I override, not hide, a member variable (field) in a C# subclass?

C# : How do I override, not hide, a member variable (field) in a C# subclass?
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C# : How do I override, not hide, a member variable (field) in a C# subclass?
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C# in override, a : hide, I (field) not do How C# member a variable subclass?