DoubleBracketedTokenHelper - A template / token helper thingy I put together where each token is wrapped in double brackets a la handlebars.js like. This is definately half-baked and is meant to be more of a "Hey, note to self: next time your coding a template helper, remember to look at this gist to get some ideas about how to go about writing …

DoubleBracketedTokenHelper.cs

public class DoubleBracketedTokenHelper
{
    public Dictionary<string, string> TokensAndValues = new Dictionary<string, string>();

    /// <summary>
    /// Tokens to ignore. 
    /// </summary>
    public List<string> IgnoredTokens = new List<string> { "{{cr}}" };

    // This finds any characters in between open and closing double brackets
    // As an example, the following string will match on the following results:
    // String: On {{DayOfTheWeek}} I went to the store and spent {{Amount}}.
    // Match 1: {{DayOfTheWeek}}
    // Match 2: {{Amount}}
    const string FindDoubleBracketedTokens = @"\{\{[^}]*\}\}";

    public string DeTokenize( string stringWithTokens )
    {
        var matches = Regex.Matches( stringWithTokens, FindDoubleBracketedTokens, RegexOptions.Compiled );

        foreach ( Match match in matches )
        {
            string token = match.Value;

            if ( string.IsNullOrWhiteSpace( token ) || IgnoredTokens.Contains( token ) ) continue;

            string key = GetTokenValue( token );

            string value;

            if ( TokensAndValues.TryGetValue( key, out value ) == false )
            {
                throw new Exception( string.Format( "There is no data to substitute for the following token: {0}", match ) );
            }

            stringWithTokens = stringWithTokens.Replace( token, value );
        }

        return stringWithTokens;
    }

    public virtual string GetTokenValue( string token )
    {
        if ( string.IsNullOrWhiteSpace( token ) ) return token;

        return token.Replace( "{{", "" ).Replace( "}}", "" );
    }
}