StringBuilder

Object –> StringBuilder

construction

var sb = new StringBuilder("string"); // string is optional.
var sb = new StringBuilder("string", initial_capacity);
var sb = new StringBuilder(initial_capacity, max_capacity);

properties

• Chars[index] — Return or set the character at index.
• Length — Current number of characters in the StringBuilder.
• Capacity — Number of characters that the StringBuilder can currently hold. This is increased dynamically.
• MaxCapacity — By default, set to Int32.MaxValue. Can be overwritten.

methods

manipulating

These methods accept a string, substring, character array, or the string representation of a primitive data type:

• Append("substr") — Append substr to the StringBuilder.
• AppendJoin(sep, "str[]") — Concatenate str array with sep between each string and append to the StringBuilder.
• AppendLine("substr") — Append substr and \r\n to the StringBuilder.
• Insert(index, "str") — Insert str at index.
• Replace("old," "new") — Replace old with new.

deleting

• Clear() — Empties the StringBuilder and sets Length to 0.
• Remove(index, n) — Removes n characters from StringBuilder starting at index.

miscellaneous

.EnsureCapacity(n) — Ensure the capacity of the StringBuilder is at least n. If not, expand it.
.ToString() — Returns the built string.