Redundant modifiers

// This is all fine:

public class ShopKeeper                              // "public" is useful here
{
    public string NameOnBadge { get; private set; }  // "public" is useful here
    internal void SecretHandshake();                 // "internal" is useful here
}

// This is needlessly verbose:

internal class ShelfStacker                          // "internal" is redundant at namespace level
{
    private Clothing Underpants { get; set; }        // "private is redundant at class level
}

// I prefer:

class ShelfStacker                                   // defaults to "internal"
{
    Clothing Underpants { get; set; }                // defaults to "private"
}

// ...especially when a class has a lot of private members. I don't like the clutter.