Variable never initialized with value

[LaviniaSurubariu]

Type of issue

Code doesn't work

Description

• In the DisplayGenericParameter method, variable classConstraint is initialized with null and then is checked without getting any value.

    Type classConstraint = null;
  
    foreach(Type iConstraint in tp.GetGenericParameterConstraints())
    {
        if (iConstraint.IsInterface)
        {
            Console.WriteLine("         Interface constraint: {0}",
                iConstraint);
        }
    }
  
    if (classConstraint != null)
    {
        Console.WriteLine("         Base type constraint: {0}",
            tp.BaseType);
    }
    else
    {
        Console.WriteLine("         Base type constraint: None");
    }
  

• After changing it to

     Type classConstraint = tp.BaseType;
  

it is displayed the right base type constraint when executing this line of code :

     DisplayGenericType(typeof(Test<>));

Page URL

https://learn.microsoft.com/en-us/dotnet/fundamentals/reflection/how-to-examine-and-instantiate-generic-types-with-reflection

Content source URL

https://github.com/dotnet/docs/blob/main/docs/fundamentals/reflection/how-to-examine-and-instantiate-generic-types-with-reflection.md

Document Version Independent Id

100f6dac-701d-701c-0e4b-4308570887a6

Platform Id

b0ffbd50-46af-d46a-1a52-59f6d5790be1

Article author

@dotnet-bot

Metadata

• ID: 06896d3a-bd8d-60bd-e652-211bd7454d80
• PlatformId: b0ffbd50-46af-d46a-1a52-59f6d5790be1
• Service: dotnet-fundamentals

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