CA1801 ignores uses in LINQ expressions

[cston]

using System.Linq;
class C
{
    static object F(int[] c, int i)
    {
        return from o in c where o != i select o;
    }
    static object G(int[] c, int i)
    {
        return c.Where(o => o != i);
    }
}

c.cs(4,27): warning CA1801: Parameter c of method F is never used. Remove the parameter or use it in the method body.
c.cs(4,34): warning CA1801: Parameter i of method F is never used. Remove the parameter or use it in the method body.

[mavasani]

Same here - this is known IOperation bug.

[mavasani]

IOperation bug - dotnet/roslyn#8884 (comment)