System
Namespaces
Classes
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Represents text as a sequence of characters.
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Represents a 32-bit signed integer.
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Represents an instance of time.
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Represents errors that occur during application execution.
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Provides standard input, output, and error streams.
Interfaces
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Defines a method to release unmanaged resources.
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Exposes an enumerator, which supports a simple iteration over a non-generic collection.
Structs
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Base class for all value types.
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Represents a Boolean value (true or false).
Enums
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Specifies the day of the week.
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Specifies the scope of an environment variable.
String
Represents text as a sequence of characters.
Inheritance: Object → String
Constructors
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String(char[] value)Initializes a new instance of the String class to the value indicated by a specified array of Unicode characters.
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String(char[] value, int startIndex, int length)Initializes a new instance of the String class to the value indicated by a specified subarray of Unicode characters, a starting position and a length.
Properties
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Chars[int index]Gets the Char object at the specified position in the current String object.
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LengthGets the number of characters in the current String object.
Methods
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CompareTo(string strB)Compares the current string instance to another string instance.
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Contains(string value)Determines whether the specified string occurs within this string.
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EndsWith(string value)Determines whether the specified string ends with the characters of this string.
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Equals(string value)Determines whether the specified string is equal to the current string.
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IndexOf(string value)Returns the zero-based index of the first occurrence of the specified string within this string.
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Insert(int startIndex, string value)Inserts a string into this instance at the specified zero-based index.
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PadLeft(int totalWidth, char paddingChar)Pads the current string with as many specified characters as needed to reach a specified total length, and aligns the text to the center of the padded space.
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Remove(int startIndex)Removes all characters from this string starting at a specified position and continuing through the last position.
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Replace(char oldChar, char newChar)Replaces all occurrences of a specified Unicode character in this instance with another specified Unicode character.
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Split(char[] separator)Splits this string into a sequence of substrings based on the specified separators.
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StartsWith(string value)Determines whether the current string begins with the specified string.
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Substring(int startIndex)Retrieves a substring from this instance. The substring starts at a specified character position and continues to the end of the string.
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ToLower()Converts this string to lowercase.
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ToUpper()Converts this string to uppercase.
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Trim()Removes all leading and trailing white space characters from the current String object.
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TrimEnd(char[] trimChars)Removes all trailing occurrences of a set of characters specified by trimChars from the current String object.
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TrimStart(char[] trimChars)Removes all leading occurrences of a set of characters specified by trimChars from the current String object.
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Format(string format, object arg0)Formats a string by using the specified format string and arguments.
Fields
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EmptyRepresents an empty string.