Adds initial support for reading parameters passed to consent UI

src/Lithnet.CredentialProvider/ConsentUI/ConsentUIDataCredCollect.cs

@@ -0,0 +1,19 @@
+using System;
+
+namespace Lithnet.CredentialProvider
+{
+    /// <summary>
+    /// Represents the data structure passed to consent UI in a yet unknown scenario
+    /// </summary>
+    /// <remarks>This data structure is currently unknown and only the common header values are present</remarks>
+    public class ConsentUIDataCredCollect : ConsentUIData
+    {
+        internal ConsentUIDataCredCollect(IntPtr pData, int expectedSize) : base(pData, expectedSize)
+        {
+            if (this.header.Type != ConsentUIType.CredCollect)
+            {
+                throw new InvalidOperationException("The data structure is not of type CredCollect");
+            }
+        }
+    }
+}