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Compiler Error CS1925

Visual Studio 2008

Updated: May 2010

Cannot initialize object of type 'type' with a collection initializer.

Collection initializers are only allowed for collection classes that meet certain criteria. For more information, see Object and Collection Initializers (C# Programming Guide). This error is also produced when you try to use the short form of an array initializer nested inside a collection initializer.

To correct this error

  • Initialize the object by calling its constructors and methods.

The following code generates CS1925:

// cs1925.cs
public class Student
    public int[] Scores;

class Test
    static void Main(string[] args)
        //Student student = new Student { Scores = { 1, 2, 3 } }; // Causes CS1925.

        // Use the default constructor, then initialize the array separately.
        Student student1 = new Student();
        student1.Scores = new[] { 1, 2, 3 };

        // Use an object initializer to create and initialize the object.
        Student student2 = new Student { Scores = new[] { 1, 2, 3 } };





May 2010

Expanded the code example to illustrate how to fix the problem.

Customer feedback.