public void AppendJoin()
{
var list = new List<string> {"Fizz", "Buzz"};
// Type
var @this = new StringBuilder();
// Exemples
@this.AppendJoin(",", list.ToArray()); // return "Fizz,Buzz";
// Unit Test
Assert.AreEqual("Fizz,Buzz", @this.ToString());
}
public static StringBuilder AppendJoin(
this StringBuilder stringBuilder, IEnumerable <string> values, string separator = ", ")
=> stringBuilder.AppendJoin(values, (sb, value) => sb.Append(value), separator);
public static StringBuilder AppendJoin(
this StringBuilder stringBuilder, string separator, params string[] values)
=> stringBuilder.AppendJoin(values, (sb, value) => sb.Append(value), separator);