How to convert a column number (e.g. 127) into an Excel column (e.g. AA)

Question

How do you convert a numerical number to an Excel column name in C# without using automation getting the value directly from Excel.

Excel 2007 has a possible range o

Answer 1

Just throwing in a simple two-line C# implementation using recursion, because all the answers here seem far more complicated than necessary.

/// 

/// Gets the column letter(s) corresponding to the given column number.
/// 
/// The one-based column index. Must be greater than zero.
/// The desired column letter, or an empty string if the column number was invalid.
public static string GetColumnLetter(int column) {
    if (column < 1) return String.Empty;
    return GetColumnLetter((column - 1) / 26) + (char)('A' + (column - 1) % 26);
}