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C# Nullable Solution

Solution 1​

We can simply make the properties nullable, as shown below:

public class AppSetting {
    public string? ReferenceKey { get; set; }
    public string? Value { get; set; }
    public string? Description { get; set; }
}

Solution 2​

We can assign a default value to those properties as shown below:

public class AppSetting {
    public string ReferenceKey { get; set; } = “Default Key”
    public string Value { get; set; } = “Default Value”
    public string Description { get; set; } = “Default Description”
}

Alternatively, you can give a reasonable default value for non-nullable strings as string.empty.

Solution 3​

You can disable this warning from project level. You can disable by removing the below line from project file csproj or setting.

<Nullable>enable</Nullable>