Add project files.

Compat.Private.Serialization/Compat/Runtime/Serialization/GenericParameterDataContract.cs

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+using System;
+using System.Collections.Generic;
+
+namespace Compat.Runtime.Serialization
+{
+    internal sealed class GenericParameterDataContract : DataContract
+    {
+        private readonly GenericParameterDataContractCriticalHelper _helper;
+
+        internal GenericParameterDataContract(Type type)
+            : base(new GenericParameterDataContractCriticalHelper(type))
+        {
+            _helper = base.Helper as GenericParameterDataContractCriticalHelper;
+        }
+
+        internal int ParameterPosition => _helper.ParameterPosition;
+
+        internal override bool IsBuiltInDataContract => true;
+
+        private class GenericParameterDataContractCriticalHelper : DataContract.DataContractCriticalHelper
+        {
+            private readonly int parameterPosition;
+
+            internal GenericParameterDataContractCriticalHelper(Type type)
+                : base(type)
+            {
+                SetDataContractName(DataContract.GetStableName(type));
+                parameterPosition = type.GenericParameterPosition;
+            }
+
+            internal int ParameterPosition => parameterPosition;
+        }
+
+        internal override DataContract BindGenericParameters(DataContract[] paramContracts, Dictionary<DataContract, DataContract> boundContracts)
+        {
+            return paramContracts[ParameterPosition];
+        }
+    }
+}