C#

string Display(object o)
{
    return o switch
    {   
        Point p => $"({p.X}, {p.Y})",
        _ => "unknown"
    };
}

OriginalGriff wrote:

Which means that we will have to deal with it as maintenance in future...

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.

string inputString = "The quick brown fox jumps over the lazy dog";
char[] chars = new char[inputString.Length];
for (int i = 0; i < inputString.Length; i++)
{
    if (inputString[i] >= 'a' && inputString[i] < 'h') // is it between a and g (lower case only)
        chars[i] = (char)(inputString[i] + 1);         // yes, add 1 to make it the next letter
    else
        chars[i] = inputString[i];                     // no, copy direct to the output buffer
}
Console.WriteLine(chars);

private const string transA = "abcdefghijklmnopqurstuvwxyz";
private const string transB = "bcdefghijklmnopqurstuvwxyza";

char[] chars = new char[inputString.Length];
for (int i = 0; i < inputString.Length; i++)
    {
    int index = transA.IndexOf(inputString[i]);
    chars[i] = index >= 0 ? transB[index] : inputString[i];
    }
string outputString = new string(chars);

OriginalGriff wrote:

Richard's solution will work fine, but a better solution is to have two "translation arrays":

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.

string ss = string.Join("", inputString.Select(ch => (char)(ch + 1)));