private static System.Text.RegularExpressions.Regex SafeIdentifierRegex();
System.Text.RegularExpressions.Regex
Pattern explanation:
○ Match if at the beginning of the string.<br/>
○ Match a character in the set [A-Z_a-z].<br/>
○ Match a character in the set [0-9A-Z_a-z] atomically any number of times.<br/>
○ Match if at the end of the string or if before an ending newline.<br/>