Reference:	https://github.com/nant/nant/issues/91
Obtained from:	https://github.com/nant/nant/commit/69c8ee96493c5d953212397c8ca06c2392372ca4
		https://github.com/nant/nant/commit/4ad065d009b043996d4ce2d25ce5031d81c6ce60

--- src/NAnt.Console/App.config.orig	2012-06-09 14:05:53 UTC
+++ src/NAnt.Console/App.config
@@ -1724,6 +1724,7 @@
                     </task-assemblies>
                     <tool-paths>
                         <directory name="${toolDirectory}" />
+                        <directory name="${path::combine(frameworkAssemblyDirectory, 'mono/4.5')}" />
                         <directory name="${path::combine(frameworkAssemblyDirectory, 'mono/1.0')}" />
                         <!-- for compatibility with Mono 1.0.x -->
                         <directory name="${frameworkAssemblyDirectory}" />
@@ -1782,6 +1783,14 @@
                         <if test="${version::parse(mono.version) >= version::parse('1.2.3.50')}">
                             <property name="resgen.supportsexternalfilereferences" value="true" />
                         </if>
+                        <if test="${version::parse(mono.version) &lt; version::parse('3.0')}">
+                            <property name="csc.tool" value="mcs"/>
+                            <property name="mcs.sdk" value="0"/>
+                        </if>
+                        <if test="${version::parse(mono.version) >= version::parse('3.0')}">
+                            <property name="csc.tool" value="mcs"/>
+                            <property name="mcs.sdk" value="2"/>
+                        </if>
 
                         <target name="configure-from-pkg-config">
                             <property name="mono.version" value="${pkg-config::get-mod-version('mono')}" />
@@ -1820,7 +1829,8 @@
                             <attribute name="managed">true</attribute>
                         </task>
                         <task name="csc">
-                            <attribute name="exename">gmcs</attribute>
+                            <attribute name="exename">${csc.tool}</attribute>
+                            <attribute name="mcssdk">${mcs.sdk}</attribute>
                             <attribute name="managed">true</attribute>
                             <attribute name="supportspackagereferences">true</attribute>
                             <attribute name="supportsnowarnlist">true</attribute>
@@ -1912,6 +1922,7 @@
                     </task-assemblies>
                     <tool-paths>
                         <directory name="${path::combine(frameworkAssemblyDirectory, 'mono/3.5')}" />
+                        <directory name="${path::combine(frameworkAssemblyDirectory, 'mono/4.5')}" />
                         <directory name="${path::combine(frameworkAssemblyDirectory, 'mono/2.0')}" />
                         <directory name="${path::combine(frameworkAssemblyDirectory, 'mono/1.0')}" />
                         <!-- unmanaged tools -->
@@ -1934,6 +1945,14 @@
 
                         <property name="toolDirectory" value="${path::combine(frameworkAssemblyDirectory, 'mono/3.5')}" />
                         <property name="runtimeEngine" value="${path::combine(sdkInstallRoot, 'bin/mono.exe')}" />
+                        <if test="${version::parse(mono.version) &lt; version::parse('3.0')}">
+                            <property name="csc.tool" value="mcs"/>
+                            <property name="mcs.sdk" value="0"/>
+                        </if>
+                        <if test="${version::parse(mono.version) >= version::parse('3.0')}">
+                            <property name="csc.tool" value="mcs"/>
+                            <property name="mcs.sdk" value="2"/>
+                        </if>
 
                         <target name="configure-from-pkg-config">
                             <property name="mono.version" value="${pkg-config::get-mod-version('mono')}" />
@@ -1972,7 +1991,8 @@
                             <attribute name="managed">true</attribute>
                         </task>
                         <task name="csc">
-                            <attribute name="exename">gmcs</attribute>
+                            <attribute name="exename">${csc.tool}</attribute>
+                            <attribute name="mcssdk">${mcs.sdk}</attribute>
                             <attribute name="managed">true</attribute>
                             <attribute name="langversion">linq</attribute>
                             <attribute name="supportspackagereferences">true</attribute>
@@ -2067,6 +2087,7 @@
                     </task-assemblies>
                     <tool-paths>
                         <directory name="${path::combine(frameworkAssemblyDirectory, 'mono/4.0')}" />
+                        <directory name="${path::combine(frameworkAssemblyDirectory, 'mono/4.5')}" />
                         <directory name="${path::combine(frameworkAssemblyDirectory, 'mono/3.5')}" />
                         <directory name="${path::combine(frameworkAssemblyDirectory, 'mono/2.0')}" />
                         <directory name="${path::combine(frameworkAssemblyDirectory, 'mono/1.0')}" />
@@ -2090,6 +2111,14 @@
 
                         <property name="toolDirectory" value="${path::combine(frameworkAssemblyDirectory, 'mono/4.0')}" />
                         <property name="runtimeEngine" value="${path::combine(sdkInstallRoot, 'bin/mono.exe')}" />
+                        <if test="${version::parse(mono.version) &lt; version::parse('3.0')}">
+                            <property name="csc.tool" value="dmcs"/>
+                            <property name="mcs.sdk" value="0"/>
+                        </if>
+                        <if test="${version::parse(mono.version) >= version::parse('3.0')}">
+                            <property name="csc.tool" value="mcs"/>
+                            <property name="mcs.sdk" value="4"/>
+                        </if>
 
                         <target name="configure-from-pkg-config">
                             <property name="mono.version" value="${pkg-config::get-mod-version('mono')}" />
@@ -2128,7 +2157,8 @@
                             <attribute name="managed">true</attribute>
                         </task>
                         <task name="csc">
-                            <attribute name="exename">dmcs</attribute>
+                            <attribute name="exename">${csc.tool}</attribute>
+                            <attribute name="mcssdk">${mcs.sdk}</attribute>
                             <attribute name="managed">true</attribute>
                             <attribute name="langversion">linq</attribute>
                             <attribute name="supportspackagereferences">true</attribute>
@@ -2212,6 +2242,7 @@
                     </task-assemblies>
                     <tool-paths>
                         <directory name="${toolDirectory}" />
+                        <directory name="${path::combine(frameworkAssemblyDirectory, 'mono/4.5')}" />
                         <directory name="${path::combine(frameworkAssemblyDirectory, 'mono/2.0')}" />
                         <directory name="${path::combine(frameworkAssemblyDirectory, 'mono/1.0')}" />
                         <!-- unmanaged tools -->
@@ -2234,6 +2265,14 @@
 
                         <property name="toolDirectory" value="${path::combine(frameworkAssemblyDirectory, 'mono/2.1')}" />
                         <property name="runtimeEngine" value="${path::combine(sdkInstallRoot, 'bin/mono.exe')}" />
+                        <if test="${version::parse(mono.version) &lt; version::parse('3.0')}">
+                            <property name="csc.tool" value="smcs"/>
+                            <property name="mcs.sdk" value="0"/>
+                        </if>
+                        <if test="${version::parse(mono.version) >= version::parse('3.0')}">
+                            <property name="csc.tool" value="mcs"/>
+                            <property name="mcs.sdk" value="2.1"/>
+                        </if>
 
                         <target name="configure-from-pkg-config">
                             <property name="mono.version" value="${pkg-config::get-mod-version('mono')}" />
@@ -2267,7 +2306,8 @@
                     </project>
                     <tasks>
                         <task name="csc">
-                            <attribute name="exename">smcs</attribute>
+                            <attribute name="exename">${csc.tool}</attribute>
+                            <attribute name="mcssdk">${mcs.sdk}</attribute>
                             <attribute name="managed">true</attribute>
                             <attribute name="supportspackagereferences">true</attribute>
                             <attribute name="supportsnowarnlist">true</attribute>
@@ -2502,6 +2542,7 @@
                     </task-assemblies>
                     <tool-paths>
                         <directory name="${toolDirectory}" />
+                        <directory name="${path::combine(prefix, 'lib/mono/4.5')}" />
                         <directory name="${path::combine(prefix, 'lib/mono/1.0')}" />
                         <!-- unmanaged tools -->
                         <directory name="${prefix}/bin" />
@@ -2526,13 +2567,22 @@
                         <if test="${pkg-config::is-atleast-version('mono', '1.2.3.50')}">
                             <property name="resgen.supportsexternalfilereferences" value="true" />
                         </if>
+                        <if test="${not(pkg-config::is-atleast-version('mono', '3.0'))}">
+                            <property name="csc.tool" value="mcs"/>
+                            <property name="mcs.sdk" value="0"/>
+                        </if>
+                        <if test="${pkg-config::is-atleast-version('mono', '3.0')}">
+                            <property name="csc.tool" value="mcs"/>
+                            <property name="mcs.sdk" value="2"/>
+                        </if>
                     </project>
                     <tasks>
                         <task name="al">
                             <attribute name="managed">true</attribute>
                         </task>
                         <task name="csc">
-                            <attribute name="exename">gmcs</attribute>
+                            <attribute name="exename">${csc.tool}</attribute>
+                            <attribute name="mcssdk">${mcs.sdk}</attribute>
                             <attribute name="managed">true</attribute>
                             <attribute name="supportspackagereferences">true</attribute>
                             <attribute name="supportsnowarnlist">true</attribute>
@@ -2616,6 +2666,7 @@
                     </task-assemblies>
                     <tool-paths>
                         <directory name="${toolDirectory}" />
+                        <directory name="${path::combine(prefix, 'lib/mono/4.5')}" />
                         <directory name="${path::combine(prefix, 'lib/mono/2.0')}" />
                         <directory name="${path::combine(prefix, 'lib/mono/1.0')}" />
                         <!-- unmanaged tools -->
@@ -2628,13 +2679,22 @@
                         <property name="resgen.supportsexternalfilereferences" value="false" />
                         <property name="prefix" value="${pkg-config::get-variable('mono', 'prefix')}" />
                         <property name="toolDirectory" value="${path::combine(prefix, 'lib/mono/3.5')}" />
+                        <if test="${not(pkg-config::is-atleast-version('mono', '3.0'))}">
+                            <property name="csc.tool" value="mcs"/>
+                            <property name="mcs.sdk" value="0"/>
+                        </if>
+                        <if test="${pkg-config::is-atleast-version('mono', '3.0')}">
+                            <property name="csc.tool" value="mcs"/>
+                            <property name="mcs.sdk" value="2"/>
+                        </if>
                     </project>
                     <tasks>
                         <task name="al">
                             <attribute name="managed">true</attribute>
                         </task>
                         <task name="csc">
-                            <attribute name="exename">gmcs</attribute>
+                            <attribute name="exename">${csc.tool}</attribute>
+                            <attribute name="mcssdk">${mcs.sdk}</attribute>
                             <attribute name="managed">true</attribute>
                             <attribute name="langversion">linq</attribute>
                             <attribute name="supportspackagereferences">true</attribute>
@@ -2721,6 +2781,7 @@
                     </task-assemblies>
                     <tool-paths>
                         <directory name="${toolDirectory}" />
+                        <directory name="${path::combine(prefix, 'lib/mono/4.5')}" />
                         <directory name="${path::combine(prefix, 'lib/mono/3.5')}" />
                         <directory name="${path::combine(prefix, 'lib/mono/2.0')}" />
                         <directory name="${path::combine(prefix, 'lib/mono/1.0')}" />
@@ -2734,13 +2795,22 @@
                         <property name="resgen.supportsexternalfilereferences" value="false" />
                         <property name="prefix" value="${pkg-config::get-variable('mono', 'prefix')}" />
                         <property name="toolDirectory" value="${path::combine(prefix, 'lib/mono/4.0')}" />
+                        <if test="${not(pkg-config::is-atleast-version('mono', '3.0'))}">
+                            <property name="csc.tool" value="dmcs"/>
+                            <property name="mcs.sdk" value="0"/>
+                        </if>
+                        <if test="${pkg-config::is-atleast-version('mono', '3.0')}">
+                            <property name="csc.tool" value="mcs"/>
+                            <property name="mcs.sdk" value="4"/>
+                        </if>
                     </project>
                     <tasks>
                         <task name="al">
                             <attribute name="managed">true</attribute>
                         </task>
                         <task name="csc">
-                            <attribute name="exename">dmcs</attribute>
+                            <attribute name="exename">${csc.tool}</attribute>
+                            <attribute name="mcssdk">${mcs.sdk}</attribute>
                             <attribute name="managed">true</attribute>
                             <attribute name="langversion">linq</attribute>
                             <attribute name="supportspackagereferences">true</attribute>
@@ -2824,6 +2894,7 @@
                     </task-assemblies>
                     <tool-paths>
                         <directory name="${toolDirectory}" />
+                        <directory name="${path::combine(prefix, 'lib/mono/4.5')}" />
                         <directory name="${path::combine(prefix, 'lib/mono/2.0')}" />
                         <directory name="${path::combine(prefix, 'lib/mono/1.0')}" />
                         <!-- unmanaged tools -->
@@ -2835,10 +2906,19 @@
                         </if>
                         <property name="prefix" value="${pkg-config::get-variable('mono', 'prefix')}" />
                         <property name="toolDirectory" value="${path::combine(prefix, 'lib/mono/2.1')}" />
+                        <if test="${not(pkg-config::is-atleast-version('mono', '3.0'))}">
+                            <property name="csc.tool" value="smcs"/>
+                            <property name="mcs.sdk" value="0"/>
+                        </if>
+                        <if test="${pkg-config::is-atleast-version('mono', '3.0')}">
+                            <property name="csc.tool" value="mcs"/>
+                            <property name="mcs.sdk" value="2.1"/>
+                        </if>
                     </project>
                     <tasks>
                         <task name="csc">
-                            <attribute name="exename">smcs</attribute>
+                            <attribute name="exename">${csc.tool}</attribute>
+                            <attribute name="mcssdk">${mcs.sdk}</attribute>
                             <attribute name="managed">true</attribute>
                             <attribute name="supportspackagereferences">true</attribute>
                             <attribute name="supportsnowarnlist">true</attribute>