String print = "8A9B485ECDC56B6E0FD023D6994A57EEC49B0717";
String newPrint = thumbprint.Trim().Replace(" ", "").ToUpper();

print
"8A9B485ECDC56B6E0FD023D6994A57EEC49B0717"
newPrint
"‎8A9B485ECDC56B6E0FD023D6994A57EEC49B0717"
String.Compare(print, newPrint);
0
print == newPrint
false
print.Equals(newPrint)
false

print.Length
40
newPrint.Length
41
(sbyte)print[0]
56
(sbyte)newPrint[0]
14

string val   = "8A9B485ECDC56B6E0FD023D6994A57EEC49B0717";
string val1  = "‎8A9B485ECDC56B6E0FD023D6994A57EEC49B0717";
var bt = System.Text.Encoding.UTF8.GetBytes(val);
var bt_1 = System.Text.Encoding.UTF8.GetBytes(val1);

226
128
142

void TestString()
{
    String print = "8A9B485ECDC56B6E0FD023D6994A57EEC49B0717";
    String newPrint = print.Trim().Replace(" ", "").ToUpper();
    Trace.TraceInformation("Strings are equal = {0}", (print == newPrint) && (print.Equals(newPrint)));
    Debug.Assert(print == newPrint);
    Debug.Assert(print.Equals(newPrint));
}