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ConfigurationPropertyAttribute.IsRequired Property

Gets or sets a value indicating whether the decorated element property is required.

Namespace:  System.Configuration
Assembly:  System.Configuration (in System.Configuration.dll)

public bool IsRequired { get; set; }

Property Value

Type: System.Boolean
true if the property is required; otherwise, false. The default is false.

The following example shows how to use the DefaultValue property.

[ConfigurationProperty("url", DefaultValue = "http://www.contoso.com",
    IsRequired = true)]
[RegexStringValidator(@"\w+:\/\/[\w.]+\S*")]
public string Url
{
    get
    {
        return (string)this["url"];
    }
    set
    {
        this["url"] = value;
    }
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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