ContractClassForAttribute Constructor

Initializes a new instance of the ContractClassForAttribute class, specifying the type the current class is a contract for.

Namespace:  System.Diagnostics.Contracts
Assembly:  mscorlib (in mscorlib.dll)

public ContractClassForAttribute(
	Type typeContractsAreFor
)

Parameters

typeContractsAreFor
Type: System.Type
The type the current class is a contract for.

The following example shows how to use the ContractClassAttribute constructor to specify that the contracts in the type apply to the IArray interface. This code example is part of a larger example provided for the ContractClassAttribute class.


[ContractClassFor(typeof(IArray))]
internal abstract class IArrayContract : IArray
{
    int IArray.Add(Object value)
    {
        // Returns the index in which an item was inserted.
        Contract.Ensures(Contract.Result<int>() >= -1);
        Contract.Ensures(Contract.Result<int>() < ((IArray)this).Count);
        return default(int);
    }
    Object IArray.this[int index]
    {
        get
        {
            Contract.Requires(index >= 0);
            Contract.Requires(index < ((IArray)this).Count);
            return default(int);
        }
        set
        {
            Contract.Requires(index >= 0);
            Contract.Requires(index < ((IArray)this).Count);
        }
    }
    public int Count
    {
        get
        {
            Contract.Requires(Count >= 0);
            Contract.Requires(Count < ((IArray)this).Count);
            return default(int);
        }
    }

    void IArray.Clear()
    {
        Contract.Ensures(((IArray)this).Count == 0);
    }

    void IArray.Insert(int index, Object value)
    {
        Contract.Requires(index >= 0);
        Contract.Requires(index <= ((IArray)this).Count);  // For inserting immediately after the end.
        Contract.Ensures(((IArray)this).Count == Contract.OldValue(((IArray)this).Count) + 1);
    }

    void IArray.RemoveAt(int index)
    {
        Contract.Requires(index >= 0);
        Contract.Requires(index < ((IArray)this).Count);
        Contract.Ensures(((IArray)this).Count == Contract.OldValue(((IArray)this).Count) - 1);
    }
}


Silverlight

Supported in: 5, 4

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Community Additions

ADD
Show: