Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data.Linq/FunctionResults.cs

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+using System;
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+
+namespace System.Data.Linq {
+    /// <summary>
+    /// The result of executing a query.
+    /// </summary>
+    public interface IExecuteResult :  IDisposable {
+        /// <summary>
+        /// The return value or result of the executed query. This object has the same type as the
+        /// query expression's Type property.
+        /// </summary>
+        object ReturnValue { get; }
+
+        /// <summary>
+        /// Retrieves the nth output parameter.  This method is normally used when the query is a mapped
+        /// function with output parameters.
+        /// </summary>
+        /// <param name="parameterIndex"></param>
+        /// <returns></returns>
+        object GetParameterValue(int parameterIndex);
+    }
+
+    /// <summary>
+    /// Interface providing access to a function return value.
+    /// </summary>
+    public interface IFunctionResult {
+        /// <summary>
+        /// The value.
+        /// </summary>
+        object ReturnValue { get; }
+    }
+
+    /// <summary>
+    /// An interface for representing the result of a mapped function with a single return sequence.
+    /// </summary>
+    [SuppressMessage("Microsoft.Naming", "CA1710:IdentifiersShouldHaveCorrectSuffix", Justification="tadam: Meant to represent a database table which is delayed loaded and doesn't provide collection semantics.")]
+    public interface ISingleResult<T> : IEnumerable<T>, IFunctionResult, IDisposable { }
+
+    /// <summary>
+    /// An interface for representing results of mapped functions or queries with variable return sequences.
+    /// </summary>
+    public interface IMultipleResults : IFunctionResult, IDisposable {
+        /// <summary>
+        /// Retrieves the next result as a sequence of Type 'TElement'.
+        /// </summary>
+        /// <typeparam name="TElement"></typeparam>
+        /// <returns></returns>
+        [SuppressMessage("Microsoft.Design", "CA1004:GenericMethodsShouldProvideTypeParameter", Justification = "tadam: Generic parameters are required for strong-typing of the return type.")]
+        IEnumerable<TElement> GetResult<TElement>();
+    }
+}