Base32

From Base32

string str = "GEYTINJRGQ======";
// ReadOnlySpan<char> str = "GEYTINJRGQ======";
Span<byte> b = str.FromBase32String();

To Base32

ReadOnlySpan<byte> b = Encoding.UTF8.GetBytes(@"114514");
// Span<byte> b = Encoding.UTF8.GetBytes(@"114514");
string str = b.ToBase32String();