C# | Check if the specified string is in the StringCollection
Last Updated :
01 Feb, 2019
StringCollection class is a new addition to the .NET Framework class library that represents a collection of strings. StringCollection class is defined in the System.Collections.Specialized namespace.
StringCollection.Contains(String) method is used to check whether the specified string is in the StringCollection or not.
Syntax:
public bool Contains (string value);
Here, value is the string to locate in the StringCollection. The value can be null.
Return Value: This method returns true if value is found in the StringCollection, otherwise it returns false.
Note:
- The Contains method can confirm the existence of a string before performing further operations.
- This method performs a linear search, therefore, this method is an O(n) operation, where n is Count.
Below programs illustrate the use of StringCollection.Contains(String) Method:
Example 1 :
using System;
using System.Collections;
using System.Collections.Specialized;
class GFG {
public static void Main()
{
StringCollection myCol = new StringCollection();
String[] myArr = new String[] { "A" , "B" , "C" , "D" , "E" };
myCol.AddRange(myArr);
Console.WriteLine(myCol.Contains( "A" ));
}
}
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Example 2:
using System;
using System.Collections;
using System.Collections.Specialized;
class GFG {
public static void Main()
{
StringCollection myCol = new StringCollection();
String[] myArr = new String[] { "2" , "3" , "4" , "5" , "6" };
myCol.AddRange(myArr);
Console.WriteLine(myCol.Contains( "8" ));
}
}
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Reference:
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