(not) Redundant Casts !!?.cs

using System;

class C
{
    void M()
    {
        string s1 = "1" + "2" + "3";
        string s2 = "1" + (string)("2" + "3"); // dimmed - redundant
        
        float f1 = 1f + 2f + 3f;
        float f2 = 1f + (float)(2f + 3f);
        float f3 = 1f + (float)(GetValue() + 3f);
        
        int i1 = 1 + 2 + 3;
        int i2 = 1 + (int)(2 + 3); // dimmed - redundant
        
        double d1 = 1d + 2d + 3d;
        double d2 = 1d + (double)(2d + 3d);
        
        Console.Write($"{s1} {s2} {f1} {f2} {f3} {i1} {i2} {d1} {d2}");
    }
    
    float GetValue() => 2f;
}

​​.sharplab.json

{
    "version": 1,
    "target": "IL",
    "mode": "Release"
}