Use String.IsNullOrEmpty

Aug 03, 2020
2 minutes to read

Purpose

Converts an expression that checks whether a string is null or empty to the String.IsNullOrEmpty method call. This shortens the code and increases code performance.

Availability

Available when the cursor is within an expression checking whether a string is null or empty.

Usage

Place the caret on an expression against a string checking whether it is null or empty.
Press the Ctrl + . or Ctrl + ~ shortcut to invoke the Code Actions menu.
Select Use String.IsNullOrEmpty from the menu.

After execution, the Refactoring replaces the logical expression with the String.IsNullOrEmpty method call.

C#
VB.NET

csharp

public bool AddRecord(string name, object data) {
    if (String.IsNullOrEmpty(name) || data == null)
        return false;

    //... 
    return true;
}

Public Function AddRecord(ByVal name As String,
                          ByVal data As Object) As Boolean
    If String.IsNullOrEmpty(name) OrElse
        data Is Nothing Then
        Return False
    End If

    '... 
    Return True
End Function