StringBuilder(Int32) constructor is used to initialize a new instance of the StringBuilder class which will be empty and will have the specified initial capacity. StringBuilder is used to represent a mutable string of characters. Mutable means the string which can be changed. So String objects are immutable but StringBuilder is the mutable string type. It will not create a new modified instance of the current string object but do the modifications in the existing string object.
public StringBuilder (int capacity);
Here, capacity is the starting size of the StringBuilder instance. If the number of characters which is to be stored becomes greater than the specified capacity then the StringBuilder object will dynamically allocate the memory to store them.
Exception: This will give ArgumentOutOfRangeException if the capacity is less than zero.
Capacity of StringBuilder: 10
Example 2: For ArgumentOutOfRangeException
System.ArgumentOutOfRangeException: ‘capacity’ must be greater than zero.
Parameter name: capacity
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